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Understanding Hearing Loops

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1.  Which of the following are requirements for the 2006 IEC standard for looping?
  1. Field strength peak value should be 400 mA/m RMS with 125ms integration time, referenced to 0dB
  2. Frequency response between 100 and 5000 Hz must be within +/- 3 dB
  3. Field strength should be measured at 1.2 meters (sitting) and 1.7 meters (standing)
  4. All of the above
2.  Approximately what fraction of all new hearing aids currently contain telecoils?
  1. 1/10
  2. 1/3
  3. 1/2
  4. 2/3
3.  The orientation of the telecoil within the hearing aid that is ideal for reception of an area induction loop signal is:
  1. Diagonal
  2. 45 degrees
  3. Vertical
  4. Horizontal
4.  What does the audio-frequency induction (AFIL) loop produce in an area?
  1. Current and magnetic energy
  2. Voltage and acoustic energy
  3. Current and acoustic energy
  4. Voltage and magnetic energy
5.  What is the main advantage of AFILS over other types of assistive listening such as infrared or frequency modulation (FM) systems:
  1. Improved sound quality
  2. Easier to manage because there are no external receivers
  3. Greater audio frequency response bandwidth
  4. Easier to install
6.  When measuring background noise with a field strength meter, which of the following levels represent acceptable and ideal noise levels respectively?
  1. <32 dB A and < 47 d BA
  2. >32 dB A and>47dB A
  3. <32 dB HL and < 47 dB HL
  4. > 32 dB HL and> 47 dB HL
7.  In which of the following loops is the user is typically surrounded by the wire?
  1. Counter loop
  2. Perimeter loop
  3. Loopdeeloop
  4. All of the above
8.  Which two groups are conducting a joint education campaign on AFIL technology?
  1. American Academy of Otolaryngology (AAO) and the American Speech-Language Hearing Association (ASHA)
  2. Academy of Doctors of Audiology (ADA) and American Association of Retired People (AARP)
  3. American Medical Association (AMA) and the National Rifle Association (NRA)
  4. Hearing Loss Association of America (HLAA) and the American Academy of Audiology (AAA)
9.  Which of the following test box measures are useful for determining the frequency response of a telecoil that is intended to be used with an AFIL?
  1. SPLITS and STS(1996)/RSETS (2003)
  2. RECD
  3. SPLIV and TLS (1996)/RTLS (2003)
  4. REIG
10.  EMI:
  1. Is a major problem with professional loop installations
  2. Can generally be eliminated or reduced to an acceptable level by trained hearing loop installers
  3. Is mainly a problem in the high frequencies and can addressed by cutting high frequency gain in the telecoil program
  4. Is only a problem with wireless technology, not with telecoils