[Fitting column] All the opticians have collected: Precautions for pure tone audiometry

The pure tone hearing test is an important basis for hearing aid fitting, and the accuracy of the results often determines the effect of the user wearing the hearing aid.As the saying goes, details determine success or failure. Today, I will explain to you the things that need to be paid attention to in the process of pure tone audiometry.

XNUMX. Air conduction hearing threshold test

▍1. First test the user’s subjectively hearing ears, if the hearing in both ears is similar, select the right ear (inertial ear).

▍2.频率测试顺序:1K→2K→4K→8K→1K→500→250,其中复测1K Hz频率点,能有效检查用户此次测听的准确性,判断用户是否理解这个测试。

If the difference between the two test results is 10 decibels or more, it is necessary to explain to the user the requirements and operations of this test again.

▍3.确定起始强度,升5降10。一般测试信号的起始强度定在40dB HL,若是听到声音,则声信号强度下降10分贝;若听不到声音,则声信号强度上升10分贝。

▍4. When the threshold difference between two adjacent octave bands is ≥20dB HL, add half octave band. If the user has a history of noise exposure or compensation is involved, he needs to take the initiative to test half octave band for him.

▍5. The sound giving time is 0.5 to 1 second each time, and the sound giving interval should not be shorter than 1 second. At the same time, the sound giving interval should be irregular to avoid rhythmic sound.

XNUMX. Bone conduction hearing threshold test

▍1. First switch the audiometer from the air conduction test program to the bone conduction test program.

▍2. First test the user’s ear with better air conduction hearing. If you feel that the hearing in both ears is similar, select the right ear (inertial ear).

▍3.频率测试顺序:1K→2K→4K→1K→500→250,其中复测1K Hz频率点,能有效检查用户此次测听的准确性,判断用户是否理解这个测试。如果两次测试结果相差10分贝及以上,则有必要重新跟用户讲解下此测试的要求和操作。

▍4.确定起始强度,升5降10。一般测试信号的起始强度定在40dB HL,若是听到声音,则声信号强度下降10分贝;若听不到声音,则声信号强度上升10分贝。

▍5. When the threshold difference between two adjacent octave bands is ≥20dB HL, add half octave band. If the user has a history of noise exposure or compensation is involved, he needs to take the initiative to test half octave band for him

▍6. The sound giving time is 0.5 to 1 second each time, and the sound giving interval should not be shorter than 1 second. At the same time, the sound giving interval should be irregular to avoid rhythmic sound.

▍7. The bone conduction test is different from the air conduction test. After testing one ear and testing the other ear, the user needs to manually switch the position of the bone conduction vibrator.

Written by: Chen Mengting from China

Audit: Made in China

Link:      [Fitting column] All the opticians have collected: Precautions for pure tone audiometry

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