This Powertone F-138 In-Ear Hearing Aid is a quality hearing aid which can help you hear the sound clearly and loudly. - Silicone ear pads in 3 different sizes, suitable for any form of ear. - If you hear a howling,check the ear (silicagel) is appropriate and whether the size of plug is tight, the appropriate choice of earplugs and plugged, make sure no air leakage.
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Choose slightly larger earplugs to avoid whistling. Insert the hearing aid into the ear canal and adjust its position in the ear canal until the soft ear tip fully unfolds and fills the ear canal;. If you hear a whistle, check whether the ear (silicone) is suitable, whether the size of the plug is tight.
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Note: If you choose without bluetooth, the hearing aids just rechargable hearing aids, not bluetooth function! The cause of howling/noise: The internal amplifier and the microphone are close to each other of the hearing aid, and the sound is continuously received and expanded, so it has a certain possibility of produce howling after power-on.
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It is caused by amplified sound from the hearing aid getting back to the micropphone and being re-amplified. Ways to avoid Whistling /noise Once the hearing aid is properly seated in your ear,the whistling will generally stop.
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Features: -USB Rechargeable, no need to replace the battery, environmental-friendly, with a long standby time. -Built-in intelligent chip, clear and noise-canceling, no worry about the noisy environment. -Strong shell, anti falling and durable, it still can be used normally even if it fell from two meters high. -360° adjustable, suitable for left or right ear to wear. -Ergonomic design, soft and flexible, can help you a lot in daily life. .
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It is caused by amplified sound from the hearing aid getting back to the micropphone and being re-amplified. Ways to avoid Whistling /noise Once the hearing aid is properly seated in your ear,the whistling will generally stop.
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With introducing our latest in digital smart chip technology including Active Digital Noise reduction you will clearly hear conversations so you easily understand everything being said and enjoy life again.
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