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20Q: Face Masks and Communication - Audiological Implications

20Q: Face Masks and Communication - Audiological Implications
Barbara Weinstein, PhD
September 14, 2020

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20Q with Gus Mueller LogoFrom the Desk of Gus Mueller

Gus Mueller, PhD, Contributing Editor, AudiologyOnline

At one time or another, we all had a speech science class, where we learned the critical acoustic characteristics of speech and how it is perceived. The most important factor, of course, is audibility. Decades of research with the articulation index and the speech intelligibility index give us a good idea of the real-world intensity levels of speech, and the importance of different frequency regions. Somewhere along the way, maybe in a different class, we also learned about the contribution of visual cues to speech understanding. There is an inverse relationship to audibility—that is, as the speech signal becomes less audible, visual cues become more important, having the greatest effect in the high frequencies, the very region which has the highest importance rating.

Today, we live in a world where most of our communication encounters outside of the home involve speaking with someone who is wearing a face mask; a barrier that reduces audibility for those important high frequencies. There is little or no reduction for the lower frequencies, so when background noise is present, the SNR also will be more adverse. Moreover, nearly all visual cues have been eliminated—what we normally would rely on for these difficult listening situations. And there is one more thing. We work with patients who have hearing losses. Even with well-fitted hearing aids, a relatively small reduction in the intensity of the input signal can have significant negative consequences.  For many, these combined effects of the face mask take them from “just able to get by” to “unable to communicate effectively.”

Our guest author this month has been involved with these issues since the general use of face masks became common earlier this year. Barbara Weinstein, PhD, is Professor of Audiology at the Graduate Center, City University of New York, and the founding Executive Officer of Doctoral Programs in Public Health, Nursing Science and Physical Therapy at the CUNY Graduate Center, where she launched the AuD program 15 years ago.

Dr. Weinstein is an internationally recognized leader in the profession of audiology, and you might know her work in the areas of evidence-based practice, aging and outcome measures. She has written numerous book chapters and is the author of both editions of the text Geriatric Audiology. While her career contributions are extensive, Barbara is probably best known as the co-developer of the family of Hearing Handicap Inventories. These inventories have been translated into over 20 different languages and are the most widely used self-assessment outcome measure. They are used to determine hearing aid candidacy, document hearing aid outcomes, assess the benefits of cochlear implants, and the efficacy of rehabilitation and counseling.

Dr. Weinstein currently is engaged in public health research in non-traditional settings including hospital emergency departments and in naturally occurring retirement communities (NORCS).  Even in our traditional audiology clinics, we certainly have experienced many non-traditional factors and procedures to consider over the past six months. One of them is the use of face masks, and Barbara is here to provide some background and guidance.


Gus Mueller, PhD
Contributing Editor

Browse the complete collection of 20Q with Gus Mueller CEU articles at

20Q: Face Masks and Communication - Audiological Implications 

Learning Outcomes

After reading this article, professionals will be able to:

  • Describe the impact of face masks on the speech signal and how this impacts communication.
  • Explain how responses to address the COVID-19 pandemic such as social distancing may negatively impact communication.
  • List communication strategies that will benefit all people including those with hearing loss when face masks are worn. 
Barbara Weinstein, PhD, Professor of Audiology at the Graduate Center, City University of New York, and Adjunct Professor of Medicine at NYU Langone Hospital      Barbara Weinstein

1. I’ve followed your work over the years. What inspired you to turn your professional attention to face masks?

I became an audiologist because even as a child I knew I wanted to help improve the lives of people living with hearing loss. My dad had a unilateral hearing loss and was not motivated to do anything about it despite the impacts on his relationships at home and at work. I realized early on that to change health behavior, a public health approach would be necessary. Hence, my early epidemiological research focused on hearing screening and measurement of self-reported hearing difficulties to identify those in need of some form of audiological intervention. Fast forward to March 2020: I live in New York City, the COVID-19 epicenter at the time, and I felt powerless and desperate to help in any way I could, albeit from a distance. A light bulb went off in my head when I recalled an experience with my 92-year-old aunt who has a hearing loss and has been hospitalized on several occasions. We were in the emergency department of a large and impersonal New York City hospital right before NYC closed down. The most popular words spoken by the patients and families around us during our six hours in the emergency area were “What did you say? I cannot hear or understand what you are saying!” The health care providers (HCP) were all wearing masks. My aunt and all the other patients could not understand a word being spoken. In our case, the HCP’s looked to me to interpret as it was easier than trying to communicate with her.

Later, while sheltering in place at home in my apartment I decided to conduct a simple experiment. I asked my husband to speak the Rainbow Passage without and while wearing his mask. Using my NIOSH sound level meter app, I noted that the reduction in sound pressure level (SPL) when he was wearing the mask was substantial. The results from this DIY experiment were intriguing, but far from scientifically defensible.  

2. Interesting. What specifically did you observe when you measured the SPL of speech through a face mask?

The output SPL appeared to differ by frequency, seemingly because of the filtering effect of the cloth mask I asked him to wear. I theorized that audibility and clarity of speech would be impacted and that communication access would be very much compromised. I also postulated that social distancing would interact with masking effects and further compromise speech intelligibility.

3. Can you explain your thinking on this?  

Of course, but first let's consider a little primer on virology and the policies necessary to mitigate the spread of COVID-19. The unique characteristic of this virus is the route of transmission via small droplets ejected from the mouth. The droplets are expelled when a person with COVID-19 coughs, sneezes, or speaks. Interestingly, speaking actually produces more droplets than does coughing (Chao, et al., 2009) and louder speech creates a relatively larger quantity of droplets than does softer speech (Anfinrud, Bax, Stadnytski, & Bax, 2020). When a person speaks, he or she releases nearly 200 viral particles per minute! Hence, it would take five minutes of speaking face to face to receive the dose of particles to readily infect a conversation partner.

4. COVID-19 can spread quite easily.  

Most certainly. As you probably already are aware, an individual can become infected with COVID-19 when breathing in the droplets expelled by a person infected with the virus. The person infected with the virus may be symptomatic or asymptomatic. How much virus is released also depends upon air flow and ventilation in a space, as well as distance from the infected person. Hence, indoor spaces and close quarters are areas where the virus can spread more easily. Given the distance the droplets travel, people are encouraged to remain at least one meter away from each other when speaking face to face. In fact, two meters or the equivalent of six feet when communicating is preferable. Wearing a mask was deemed essential in many settings, including hospitals.

5. Social distancing might also impact communication as it's harder to hear from farther away.

Indeed. The inverse square law relates directly to the social distancing recommendation. The inverse square law asserts that a specified physical quantity is inversely proportional to the square of the distance from the source of that physical quantity. Applied to speech acoustics, we know that for every doubling of the distance from the sound source in a free field situation, sound intensity will diminish by 6 decibels. To say that another way, sound diminishes by approximately 6 dB for each doubling of distance.  For example, if you are 2' away from someone who is speaking and move to 4' away, thus doubling the distance, the person's voice will be reduced by 6 dB.  Therefore, health care provider and patient communication in a variety of medical settings will be negatively impacted because of both the social distancing and masking requirements. 

6. So your at home experiment indicated the face mask might affect audibility, and we know social distancing definitely reduces audibility. Were you able to quantify these effects?

Great question, and I'll get to that. First, let's revisit some basic speech acoustics and then relate this to the filtering effects of face masking and the impact on speech clarity. First of all, masking reduces airflow, and with the mouth covered, sounds are no longer visible on the lips. The low-frequency vowel sounds are easiest to hear as they are higher in intensity. In contrast, consonant sounds are higher in frequency and lower in intensity, and so they are more difficult to detect. Notably, not all consonant sounds are created equal! The consonant sounds which are both weak in intensity and high in frequency are difficult to hear (e.g. /p/). Under most circumstances, they are visible on the lips allowing for visual clues to supplement the auditory cues, which may be inaudible with a mask. The bottom line is that face masks not only have attenuation effects thus reducing speech volume, but they also degrade speech quality and hide facial expressions/cues that are critical to speech comprehension. While hearing health care professionals are aware of the detrimental effects of face masking as it relates to speech understanding, we also have to keep in mind the collateral damage posed by strategies in place to mitigate the spread of the virus, especially on certain high-risk populations.

7. You are referring to older individuals?

Yes. Older adults are highly susceptible to the disease and are at higher risk for fatal consequences. The risk of mortality from COVID-19 increases from 3.6% for people in their 60s to 14.8% for those 70 years of age and older (Oxford COVID ‐19 Evidence Service, 2020). Older adults with co-morbidities including cardiovascular disease and diabetes are most vulnerable to COVID-19. Of course, age-related hearing loss is co-morbid with many of the conditions placing older adults at increased risk for COVID-19. Older adults, therefore, will be disadvantaged because of age-related changes in hearing for high-frequency sounds and because of the multiple co-morbidities associated with advancing age.

8. How could you more formally research the impacts of face masking on speech understanding while you were living in the epicenter of the pandemic?

Coincident with my curiosity being aroused, I received an email from a colleague in Israel. He wanted to update me on some of the advanced technological solutions for hearing enhancement offered by Alango Technologies, where he serves as the CEO.  I asked if he could make some of the face mask measurements I was interested in researching. In less than 36 hours, he and his colleague made the measurements and we published the results in an article for Hearing Review (Goldin, Weinstein, & Shiman, 2020). We decided to quantify measured voice samples in an anechoic chamber as a function of the type of mask being worn. The masks we used ranged from a simple medical mask to the N95 mask. We used a GRAS head and torso simulator to play white noise through its artificial mouth. The output acoustic signal was measured by a microphone at 2 meters distance.

9. Did your findings dovetail with your hypothesis?

Yes, we found that the efficiency and effectiveness of some of the masks being used in medical settings not only differ in terms of transmission of the COVID virus but also in terms of transmission of speech sounds. Medical face masks essentially serve as a low-pass filter, attenuating the high frequencies (2000 - 7000 Hz) where most of the energy for the high-pitched consonants so critical to speech understanding resides (Goldin, Weinstein, & Shiman, 2020). The audibility of consonants is significantly diminished when these masks are worn. The impact on persons with hearing loss trying to understand someone speaking through one of these masks is therefore quite dramatic. In short, with face masking, the high-frequency consonant sounds will now often be rendered inaudible, and they are also not visible on the lips when a mask is worn. Not surprisingly, therefore, communication accuracy and access are severely compromised.

10. Do you have the data showing the differences across the masks you tested?

Sure, Figure 1 provides a nice summary (Goldin, Weinstein, & Shiman, 2020). The traditional medical mask attenuates sound by 3 to 4 decibels, while the level of degradation was close to 12 dB for the N95 mask. It is abundantly clear that the speech quality degradation, in combination with room noise/reverberation, social distancing, and the absence of visual cues, will render speech close to unintelligible for many people being treated in both inpatient and ambulatory care settings.

Frequency-specific degradation of the input signal for different types of face masks

Figure 1. Frequency-specific degradation of the input signal for different types of face masks. The upper green response is the reference (no mask). Data obtained from a GRAS head and torso simulator playing white noise through its artificial mouth. The output acoustic signal was measured by a microphone at 2 meters distance. From Goldin, Weinstein, & Shiman, 2020.

11. Are there any masking alternatives on the horizon?

Yes. At the same time we published our article, a college student gained notoriety for the clear masks she began to produce to compensate for the loss of visibility when wearing traditional medical masks. Some hospital-based practices and some hearing aid companies also began to fabricate clear masks. With audiologists returning to their practices, and the communicative problems posed by face masking having become an issue for both health care providers and patients, there is now a demand for clear plastic masks so that mouth and facial expressions are more visible to our patients. The home-made transparent masks are problematic in terms of droplets adhering to the plastic and fogging. Also, many of the non-FDA approved clear masks do not fit the nose and mouth tightly and some apparently cause difficulty breathing. We are now studying the acoustic effects/advantages of the variety of clear masks worn by lay people and hearing health care professionals, as well as the FDA-approved masks on the market.

12. Can you tell me a little about the clear masks currently on the market?

The Communicator TM Surgical Mask with a Clear Window (Model FM86000) manufactured by Safe N’Clear is a patented FDA registered device which meets ASTM F2100 Level 1 protection surgical mask standards. It includes a fog-resistant clear window for improved communication. As you might expect the COVID-19 pandemic disrupted mask manufacturing efforts domestically and globally. These masks are made in the USA and were back-ordered through mid-July, but I'm hoping will be available when you read this article.

13. As we enter this "new normal of face masking", what other variables might impact speech understanding that we should be thinking about?

I'm glad you asked that. Several variables come to mind. These include: (1) background noise, (2) signal-to-noise ratio, (3) reverberation time, and, (4) novelty of hospital environments, which are threatening and stressful. Pichora Fuller (2016) aptly introduced the acronym “NUTS” to describe stressful listening situations such as hospitals which are:  Novel/Noisy, Unpredictable, Threatening and a challenge to one’s sense of Self-efficacy. The absence of supportive social networks to help persons with hearing loss negotiate when hospitalized or when speaking with health care professionals of course adds extra stress. And, during COVID-19, many medical centers have instituted visitor restrictions. Caregivers and others who would typically provide communication assistance or emotional support to patients on medical visits are now required to wait outside of the facility or in designated areas away from the patient and the medical providers. This adds more stress to the equation for patients, which can negatively impact communication. 

14. In what settings and situations do you see the degradation of speech having the greatest impact?

The impacts of communication breakdowns due to facial masking can be felt in a variety of health care settings. These include: (a) ambulatory and inpatient care settings (b) palliative care setting, and (c) emergency departments. In addition, communication access will be impacted during transitions in care including emergency department triage, inpatient (ICU) triage, and for incident (multicasualty) triage protocols. I should also add that when persons with hearing loss encounter first responders (e.g. ambulance drivers and fire persons) masking will impact communication exchanges, safety and welfare. 

15. Would the Americans with Disabilities Act come into play here?

Good point. As we know, the rights of persons with disabilities are protected by Federal Law. The Americans with Disability Act (ADA) of 1990 mandates communication accessibility for hospitals and other medical facilities. The US Supreme Court decided in its 1999 Olmstead decision that the ADA requires the provision of services to individuals with disabilities in the most integrated setting appropriate to their needs.

16. Maybe we could discuss patient-clinician communication in health care settings in general?

Most certainly, this is a favorite topic of mine and one which has been gaining a great deal of attention. First, let me emphasize that inaccessible and inadequate patient-clinician communication has always jeopardized care of persons with sensory disabilities. COVID-19 has exacerbated the situation. Let me add that hearing loss and physician-patient communication are rarely connected in the literature even though we know that hearing loss has an important influence on the quality of communication. And, correcting hearing loss significantly improves communication access (Cohen et al., 2017). We conducted a structured literature search that revealed that hearing loss has been largely overlooked in studies of clinician-patient communication and is rarely mentioned as a contributor to misunderstandings/mishearings in health care settings, which are vectors for ineffective communication. Since the capacity to receive verbal information is compromised in patients with hearing loss, it is not surprising that health care outcomes are compromised as well (Mormer, Cipkala-Gaffin, Bubb, & Neal, 2017). In addition, the inpatient hospital experience, length of stay and need or rehospitalizations are directly impacted by hearing loss (Chang, Weinstein, Chodosh, & Blustein, 2018; Mormer et al., 2017). Culling from a sample of participants in the Medicare Current Beneficiary Survey (MCBS), we found that 11.6% characterized their hearing difficulties as being "sufficiently severe", meaning that they had trouble communicating with their doctor or other medical personnel (Chang et al., 2018). Those who reported trouble communicating had, on average, 32% greater odds of hospital readmission. Simply put, inadequate patient-clinician communication likely compromises history taking, shared-decision making, information transfer (e.g. understanding of discharge instructions), patient autonomy, and self-management. Of course, our audiology practices will be directly affected, in innumerable ways. The pandemic is in our rear and front view mirrors and audiologists must be included in the mix in top-down discussions regarding communication access. Communicating with people with sensory loss must be as effective as communication with those without sensory loss.

17. Do you have any tips for audiologists regarding how to optimize communication in health care settings?

We are all aware of the reasonable assists available for optimizing hearing and communication during routine clinical encounters. Let’s develop and disseminate information about universal communication strategies or precautions health care professionals should adopt to improve communication with their patients. As part of the routine audiologic encounter, make sure to encourage your patients to be proactive and inform their physician/health care provider how best to communicate with them. It is imperative that you emphasize to your patients that better understanding of their health issues will promote collaborative communication and improved outcomes. It will also enable their physician to be more supportive and will help to optimize adherence to the treatment processes (Cohen et al., 2017). Also, the provision of communication concordant care and innovative communication solutions such as use of communication devices, smartphone and speech-to-text apps is imperative. I encourage my patients to tell ALL healthcare providers that they have a hearing loss and to place their Communication Access Plan (CAP) in their electronic medical record (  Finally, become part of multi-disciplinary teams working to impose system-level sustainable changes essential for communication accessibility.

18. How about strategies for communicating when wearing a mask?

I can help you there, too. Here is a top ten list of strategies. Notably, many of the strategies we typically recommend are not applicable when wearing a mask. My mask list is as follows:

  1. Reduce the level of background noise as much as possible when communicating.

2.  Talk slowly and raise the level of your voice slightly.

3.  Try to secure the attention of the person to whom you are speaking with a slight tap on the shoulder.

4.  Take turns when speaking; do not interrupt the person speaking.

5.   Use portable/hand held amplification devices to help with communication for persons with hearing loss who do not use hearing aids, and when possible use a white board as applicable.

6.   Provide large-print material to supplement what has been verbally communicated.

7.   Use speech-to-text apps, which translate speech into text in real-time with a smartphone, and use hearing aids apps when applicable.

8.   Face the listener. If using a clear mask with facial features visible, stand so the listener can clearly see your face.

9.   Always ask patients the best way to communicate with them.

10. Try not to talk to the patient while walking with them.

19. I just want to pivot for a moment. What are your thoughts on the impacts on children and adults when returning to the classroom?

I am especially concerned about “communication access” for stakeholders in educational settings ranging from pre-kindergarten to college to graduate/professional schools. Educators will have to adopt the policies regarding masking and social distancing while at the same time adhering to various federal guidelines and considering the rights of persons with disabilities. Numerous federal guidelines, namely Section 504 of the Rehabilitation Act of 1973, as amended, 29 U.S.C. § 794 (Section 504), the Americans with Disabilities Act (ADA) of 1990, and the Stafford Act of 1988, relate directly to persons who are hard of hearing, deaf, or have dual sensory impairments. The challenge to school administrators will, of course, be to avoid discrimination on the basis of disability while continuing to cooperate with public health authorities ensuring that students and educators with disabilities in all educational settings have full access in the classroom.   

Students, especially those with varying degrees of hearing loss, will miss learning opportunities with the degraded speech signal from face masks, the elimination of lipreading and speaker expressions with face masks, and social distancing (American Cochlear Implant Alliance, 2020). It is important to underscore that speaking and listening are the primary communication modes in auditory learning environments, and 75% of the school day involves listening activities. 

The American Cochlear Implant Alliance has recently shed light on considerations relating to educational access, including use of face shields which meet CDC recommendations to cover the front and sides of the face (extend to the chin or below, with no exposed gap between the forehead and the shield's headpiece), and provide barrier protection (Perencevich, Diekema, & Edmond, 2020). It is noteworthy that when physically distancing (6 feet), face shields reduce inhaled virus by 92% (Mundell, 2020). The ACI has excellent guidance on the use of face shields​​

20. And, your final take-aways?

Audiologists are well positioned to extend our reach in the face of the communication challenges posed by facial masking and physical distancing. We should take advantage of every opportunity to increase awareness and offer resources to promote effective communication among people of all ages and in all settings during this health crisis. Communication access and the need for humans to communicate responsibly and effectively is a right that we are very well qualified to help optimize.


Anfinrud, P., Bax, C., Stadnytski, V. & Bax, A. (2020). MedRxiv. Preprint doi:

American Cochlear Implant Alliance (2020). Consideration of face shields as a return to school option. Available from

Chang, J., Weinstein, B., Chodosh, J., & Blustein, J. (2018). Hospital readmission risk for patients with self-reported hearing loss and communication trouble. Journal of the American Geriatrics Society66(11), 2227-2228.

Chao, C.Y.H., Wan, M.P., Morawska, L., Johnson, G.R., Ristovski, Z.D., Hargreaves, M.,...Katoshevskig, D. (2009). Characterization of expiration air jets and droplet size distributions immediately at the mouth opening. J Aerosol Sci, 40(2), 122-133. doi:10.1016/j.jaerosci.2008.10.003

Cohen, J., Blustein, J., Weinstein, B., Dischinger, H., Sherman, S., Grudzen, C., & Chodosh, J. (2017). Studies of physician-patient communication with older patients: How often is hearing loss considered? A systematic literature review. Journal of the American Geriatrics Society, 65, 1642-1649.

Goldin, A., Weinstein, B., & Shiman, N. (2020). How do medical masks degrade speech reception? Hearing Review, 27, 8-9.

Mick, P., Foley, D., & Lin, F. (2014). Hearing loss is associated with poorer ratings of patient-physician communication and healthcare quality. J Am Geriatr Soc, 62(11), 2207-2209.

Mormer, E., Cipkala-Gaffin, J., Bubb, K., & Neal, K. (2017). Hearing and health outcomes: Recognizing and addressing hearing loss in hospitalized older adults. Seminars in Hearing38(2), 153–159.

Mundell, E.J. (2020). Should face shields replace face masks to ward off coronovirus? WebMD news. Available at 

Perencevich, E.N., Diekema, D.J., & Edmond, M.B. (2020). Moving personal protective equipment Into the community: Face shields and containment of COVID-19. JAMA, 10.1001/jama.2020.7477. Advance online publication.

Pichora-Fuller, M. (2016). How social psychological factors may modulate auditory and cognitive functioning during listening. Ear and Hearing, 37 Suppl 1, 92S-100S. 10.1097/AUD.0000000000000323. 



Weinstein, B. (2020). 20Q: Face masks and communication - audiological implications. AudiologyOnline, Article 27291. Available at


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barbara weinstein

Barbara Weinstein, PhD

Barbara Weinstein is a Professor of Audiology at the Graduate Center, CUNY and an Adjunct Professor of Medicine at NYU Langone Hospitial. She developed the world’s most widely used tools to identify patients with hearing loss which have been translated into 20+ different languages and are used globally to document the negative health effects associated with hearing loss and the outcomes associated with hearing aid use, audiologic rehabilitation and counseling, and e-rehabilitation.  Dr. Weinstein has also widely researched geriatric audiology in the areas of screening and psycho-social factors associated with hearing loss. She completed one of the first studies on senile dementia and hearing loss, and hearing loss and social isolation.

Dr. Weinstein founded and directed the Doctoral Program in Audiology at the Graduate Center, CUNY in New York City as well as the Doctoral programs in Public Health, Nursing Sciences and Physical Therapy.  The author of both editions of Geriatric Audiology, Dr. Weinstein has represented the field of audiology on federal panels and has been a leader in audiology professional societies.  Her policy and opinion pieces are read nationally and internationally by members of the audiology community and by lay people, as well.

Dr. Weinstein has long advocated for the integration of hearing health care into the mainstream be it cultural, medical or religious institutions.  Her research on hearing loss and dementia, and on the social consequences of hearing loss, has profound implications at the intersection of audiology, medicine and society.

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