AudiologyOnlinePhone: 800-753-2160


Siemens Best Sound Technology
 

Digital Hearing Aids and Amplifiers

Angela Pool, MS, FAAA

December 22, 2003


Question

If I order a 100% digital hearing aid, is that available as a class D, or are those 2 things mutually exclusive?

Answer

The two are really mutually exclusive. When you order an instrument that is ''100% digital,'' you receive an instrument that has a digital amplifier. A Class D circuit would not be necessary in most cases.

With a digital hearing instrument, the analog signal (sound hitting the microphone) is converted into a digital format by the analog-to-digital (A/D) converter and amplified within that format before being converted back to an analog signal. Other manipulations of the signal can also occur in the digital signal processing (DSP) format such as acoustic feedback reduction, noise reduction, and control of the directional microphones. When the term ''100% digital'' is used, it can be misleading as the majority of current ''digital'' hearing instruments still have some analog components such as the microphone and receiver (speaker). Rather, this term is intended to mean that the hearing instrument has the capability to amplify within a digital format. The term ''digitally programmable'' can apply to both analog and digital instruments. ''Digitally programmable'' instruments that use analog amplifiers are programmed via a computer or hand-held programmer to set the controls of the instrument; however, once programmed they are analog amplifiers. In other words, they do not employ any digital signal processing.

BIO

Angela Pool has been an Educational Specialist and trainer with Siemens Hearing Instruments for the last four years. Prior to joining Siemens she worked as a clinical audiologist at Mayo Clinic and the University of Florida Pediatric Hearing Program. Ms. Pool received her Masters degree in Audiology from the University of South Alabama.


Click here to visit the Siemens Hearing Instruments website.


angela pool

Angela Pool, MS, FAAA


Related Courses

Maximizing Speech Intelligibility for Open Canal Fittings [Text/Transcripts Course]

Presenters

Josef Chalupper, PhDRobert Kasanmascheff
Course: #11955
CEUs/Hours Offered: AAA/0.1 Intermediate; ACAud/0.1; AHIP/1.0; CAA/1.0; IHS/1.0; Kansas DHE, LTS-S0035/1.0; NZAS/1.0
Course Details

View this course for FREE. Need CEUs? Join our CEU Total Access Program to get unlimited CEUs.

Only $99/yr

Learn More

How Loud is Too Loud? Using LDL Measures for Hearing Aid Fitting and Verification (PART 1) [Recorded Webinars Course]

Presenter

Gus Mueller, PhD
Course: #13783
CEUs/Hours Offered: AAA/0.1 Introductory; ACAud/0.1; AHIP/1.0; BAA/1.0; CAA/1.0; Calif SLPAB/1.0; IHS/1.0; Kansas DHE, LTS-S0035/1.0; NZAS/1.0; SAC/1.0
Course Details

View this course for FREE. Need CEUs? Join our CEU Total Access Program to get unlimited CEUs.

Only $99/yr

Learn More

Before the Hearing Aid Fitting: What Pre-Tests Provide "Bang for the Buck"? (Part 1) [Recorded Webinars Course]

Presenter

Gus Mueller, PhD
Course: #13992
CEUs/Hours Offered: AAA/0.1 Introductory; ACAud/0.1; AHIP/1.0; BAA/1.0; CAA/1.0; Calif SLPAB/1.0; IHS/1.0; Kansas DHE, LTS-S0035/1.0; NZAS/1.0; SAC/1.0
Course Details

View this course for FREE. Need CEUs? Join our CEU Total Access Program to get unlimited CEUs.

Only $99/yr

Learn More

How Loud is Too Loud? Using LDL Measures for Hearing Aid Fitting and Verification (Part 2) [Recorded Webinars Course]

Presenter

Gus Mueller, PhD
Course: #14180
CEUs/Hours Offered: AAA/0.1 Introductory; ACAud/0.1; AHIP/1.0; BAA/1.0; CAA/1.0; Calif SLPAB/1.0; IHS/1.0; Kansas DHE, LTS-S0035/1.0; NZAS/1.0; SAC/1.0
Course Details

View this course for FREE. Need CEUs? Join our CEU Total Access Program to get unlimited CEUs.

Only $99/yr

Learn More

Before the Hearing Aid Fitting: What Pre-Tests Provide "Bang for the Buck"? Part II [Recorded Webinars Course]

Presenter

Gus Mueller, PhD
Course: #14202
CEUs/Hours Offered: AAA/0.1 Intermediate; ACAud/0.1; AHIP/1.0; BAA/1.0; CAA/1.0; Calif SLPAB/1.0; IHS/1.0; Kansas DHE, LTS-S0035/1.0; NZAS/1.0; SAC/1.0
Course Details

View this course for FREE. Need CEUs? Join our CEU Total Access Program to get unlimited CEUs.

Only $99/yr

Learn More