IHS Exam Questions and Correct Answers

In general, mold modifications are as follows: Venting affects lows, damping the midrange and horn effects boost highs. Basic verification involves: checking MCL and UCL in quiet and noise. Sound field is a controlled environment The configuration and height of the tympanogram can be a factor in deciding the proper matrix for the fitting of a hearing aid: A high Type A tells us to decrease the output by 2-3 dB You cannot use feedback checks when checking the telephone coil Verification procedures: Check the accuracy of your fitting. The problems produced by excessive ambient noise are greater for the lower frequencies than the higher frequencies The decibel is a ratio between two intensities REUR measurement are taken in an open human ear canal When a hearing aid is dead, you can check the receiver and microphone function by: turning on the instrument telecoil The dividing line between the external and middle ear is the tympanic membrane The cochlea, acting as a frequency analyzer, distributes acoustic stimuli to places along the basilar membrane according to frequency. This forms the basis of a hypothesis called the: Place Theory An organic disorder is when there is damage to: The hearing mechanism, the neural pathways and the brain. The speed of sound in air, in feet per second, is : 1100 Properly selected hearing instruments should allow: The patient to wear an instrument at a comfortable loudness level, improved communication and have better hearing aided. Crystal microphones and receivers: are very fragile