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The Telecoil: The Lonely Transducer that Can Be a Big Producer

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1.  Most hearing aid manufacturers orient the t-coil?
  1. Vertically
  2. Horizontally
  3. 45 degrees
  4. 70 degrees
2.  Horizontal orientation of the t-coil is optimum for:
  1. Telephone communication
  2. Loop communication
  3. Neither A or B
  4. Both A and B
3.  Vertical orientation of the t-coil is optimum for:
  1. Telephone communication
  2. Loop communication
  3. Neither A nor B
  4. Both A and B
4.  The strongest magnetic field strength to the t-coil during telephone communication is:
  1. Radial
  2. Radial or axial
  3. Axial
  4. None of the above
5.  Using ANSI S3.22- 2003, one objective measure of t-coil performance is:
  1. RESR90
  2. OSPL90
  3. HFA Full-on gain
  4. SPLITS
6.  The electromagnetic field strength equivalent to 60 db SPL of acoustic speech is:
  1. 56.2 mA/m
  2. 5.62 mA/m
  3. 31.6 mA/m
  4. 100 mA/m
7.  Nordic Standard EN 60118-1 (1995) suggests:
  1. An inductive signal of 31.6 mA/m should give the same acoustical input of 57-67 dB SPL @ 1000-4000 Hz and 55-67 dB @ 500-1000 Hz
  2. An inductive signal of 56.5 mA/m should give the same acoustical input of 57-67 dB SPL @ 1000-4000 Hz and 55-67 dB @ 500-1000 Hz
  3. An inductive signal of 18.8 mA/m should give the same acoustical input of 57-67 dB SPL @ 1000-4000 Hz and 55-67 dB @ 500-1000 Hz
  4. An inductive signal of 100 mA/m should give the same acoustical input of 57-67 dB SPL @ 1000-4000 Hz and 55-67 dB @ 500-1000 Hz
8.  A TMFS has a magnetic field strength of
  1. 18.8 mA/m
  2. 56.2 mA/m
  3. 31.6 mA/m
  4. 100 mA/m
9.  Using ANSI S3.22-2003 for t-coil measures, the input signal is:
  1. 65 dB SPL pure-tone sweep
  2. 60 dB SPL pink noise
  3. 60 dB SPL speech weighted noise
  4. 60 dB SPL pure-tone sweep
10.  RSETS is the difference between:
  1. HFA 500-1000-2000 Hz of the microphone frequency response and the HFA Avg 500-1000-2000 SPLITS curve
  2. HFA 1500-2500-3000 Hz of the microphone frequency response and the HFA Avg 1500-2500-3000 SPLITS curve
  3. HFA 1000-1600-2500 Hz of the microphone frequency response and the HFA Avg 1000-1600-2500 SPLITS curve
  4. HFA 2000-3000-4000 Hz of the microphone frequency response and the HFA Avg 2000-3000-4000 SPLITS curve