IHS Exam Questions And Answers

IHS Exam Questions And Answers In general, mold modifications are as follows: - ANSWER Venting affects lows, damping the midrange and horn effects boost highs. Basic verification involves: - ANSWER checking MCL and UCL in quiet and noise. Sound field is - ANSWER 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: - ANSWER A high Type A tells us to decrease the output by 2-3 dB You cannot use feedback checks when - ANSWER checking the telephone coil Verification procedures: - ANSWER Check the accuracy of your fitting. The problems produced by excessive ambient noise are - ANSWER greater for the lower frequencies than the higher frequencies The decibel is - ANSWER a ratio between two intensities REUR measurement are taken in - ANSWER an open human ear canal When a hearing aid is dead, you can check the receiver and microphone function by: - ANSWER turning on the instrument telecoil The dividing line between the external and middle ear is the - ANSWER 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: - ANSWER Place Theory An organic disorder is when there is damage to: - ANSWER The hearing mechanism, the neural pathways and the brain. The speed of sound in air, in feet per second, is : - ANSWER 1100 Properly selected hearing instruments should allow: - ANSWER The patient to wear an instrument at a comfortable loudness level, improved communication and have better hearing aided. Crystal microphones and receivers: - ANSWER are very fragile Which of the following is not a coupler used for measuring hearing aid performance? - ANSWER Zwisks Ear Simulator Small diameter tubing of SIA hearing aids has the effect of : - ANSWER reducing the high frequency gain The function of a microphone is to : - ANSWER convert acoustic energy into electrical energy Vent an earmold : - ANSWER is the most common modification made on an earmold When a new hearing instrument has feedback at the patients comfortable level, the problem is usually: - ANSWER too much wax in the ear canal With SIE-S hearing aids: - ANSWER The only signal is from the hearing aid and phrase effects from a vent are not an issue. The most comfortable level is: - ANSWER About 45 dB HL or 65 dB SPL for normal ears Any complex sound can be broken down into individual frequencies by a technique known as: - ANSWER Fourier Spectral analysis The adult ear canal: - ANSWER rises upward and forward, then descends to the drum. An effective verification is: - ANSWER a measure able improvement in communication Which of the following is not included in correct test protocols? - ANSWER plugging the hearing aid vent to control feedback Most conducive losses: - ANSWER Are medically correctable, display a breakdown or obstruction in middle ear and display good discrimination