Exam Preview for 35888: The Verifit Directional Mic Test: Evaluatin

The Verifit Directional Mic Test: Evaluating Modern Directional Microphone Technologies

Please note: exam questions are subject to change.

1. Directional microphone technology has been available since: the turn of the century the first hearing aid was built the late sixties to early seventies digital hearing aids were invented.
2. What is the unintended second variable that is introduced when conducting a "front-to-back ratio" (FBR) test on a compression hearing instrument? Angle of incidence Gain Duration of stimulus Input signal level
3. There are two stimulus options available within the Verifit directional test. Name them. Noise, Speech Noise+Noise, Speech Noise+Noise, Speech+Speech Noise+Noise, Speech+Noise
4. In the Verifit "Classic", what is the recommended orientation of the H.A.'s directional mic ports in the test box when conducting a directional test? The two mic ports rest on a vertical line between the two speakers The two mic ports rest on a horizontal line between the two speakers. The two mic ports rest on a 45 degree angled line between the two speakers, with the front mic closest to the left speaker. The two mic ports rest on a 45 degree angled line between the two speakers, with the front mic closest to the right speaker.
5. In the Verifit 2, what is the recommended orientation of the H.A.'s directional mic ports in the test box when conducting a directional mic test? Mic ports are vertical to the floor board of the test box. Mic ports are parallel to the floorboard of the test box. Mic ports are angled at 45 degrees relative to the floorboard of the test box. Mic port location is not a factor in the Verifit 2 test box.
6. What test box accessory is required in order to test a directional mic located in a remote microphone device? A second test box. An additional speaker. An iPad A couple mic extension cable.
7. Of the causes listed below, which one was NOT listed as a possible reason for not getting directional mic test curve separation when expected? Stimulus intensity level may be inadequate. SNR may need to be decreased. The directional mic feature of the aid has been activated. The directional mic is not working.
8. What are the possible reasons for directional mic test curves to be reversed? Hearing aid placement in the test box is incorrect (backward). Directional mic incorrectly wired. Both of the above. None of the above.
9. When conducting an On-Ear directional test, which frequencies are more likely to be affected by venting? Low frequencies Mid frequencies High frequencies All frequencies
10. When conducting an On-Ear directional test, which frequencies are more likely to be affected by hearing aid orientation that places the rear mic port below the front mic port? Low frequencies Mid frequencies High frequencies All frequencies