Digital Rechargeable Hearing Aids USB Ear Aid Sound Amplifier Portable Adjustable Tone For The Elderly Care Deaf Hear Aid S-318
1.High and low tone control
2.Left & right ear adjustability
3. Background noise reduction
4.Suitable for people with moderate hearing loss (80-90dB)
Peak OSPL 90 ( dB SPL): 118dB
HAF OSPL 90 ( dB SPL): 114dB
Peak Gain(dB) : 45dB
HAF/FOG Gain (dB) : 36dB
Frequency range(Hz) : 300-5500Hz
Distortion : 500Hz : 5%
800Hz : 3%
Hearing aid * 1
Silicone earplugs * 4
Cleaning brush * 1
USB charger * 1
Charger case* 1
Manual in English* 1
That is normally situation that hearing aid make whistle noise .
-If you hear a howling,check the ear (silica gel) is appropriate and whether the size of plug is tight, the appropriate choice of earplugs and plugged, make sure no air leakage.
-Increase volume gradually to avoid sudden increase in sound.
-Choose an earplug of slightly bigger size to avoid whistler.
-Adjust volume to the minimum before wearing.
About noise , you can do this steps to remove it .
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