Hearing Aids Rechargeable Sound Amplifier Hearing Aid for the Deafness Behind Ear Adjustable Amplifier Speaker Amplified

SPECIFICATIONSTotal harmonic distortion: <10%Rated power supply current consumption: <10mAOrigin: Mainland ChinaModel Number: YK-XB102High frequency average: 118dB+-4dBFull sound gain: 38dB+-5dBFrequency response range: 450Hz~3000HzEquivalent input noise: <32dBBrand Name: yongrow Tips for buyers: Causes of whistling/noise: In order to make a small hearing aid, the internal amplifier and microphone are placed close to each other. The sound is continuously received and expanded, so there is a certain possibility of whistling after power-on. At present, small hearing aids and high-power hearing aids on the market are difficult to avoid whistling, and only fully functional digital hearing aids can avoid whistling.Ways to avoid whistling/noise:1. When the power is large (the amplified sound is large), it is more likely to produce howling. Therefore, gradually increasing the bass volume can effectively prevent howling.2. When the ear canal is completely closed, there is no