Sound when checked and should be somewhat unpleasant, but not harmful using conventional equipment
The check is identical, only the phone gives a quieter sound, which is taken into account
Use headphones (wired are better)
Check the audible range quickly or in detail (up to 20,000Hz)
Select the option of the number of checked frequencies (full option - in detail up to 20 kHz)
Select ear for testing
(then you can check the another)
Always keep the volume at maximum, 100% on your device. Check with headphones!
Do not change the volume of your device!
Look for the minimum audible volume (closer to 10dB) at which each frequency is heard each time. If you do not hear at 90dB - only then press "I do not hear"
Results of test
Check the second ear or show results