Why Hearing Aids Whistle

Written By: Evan Winzenried

Why hearing aids whistle

If you’re wondering why your hearing aids whistle, you’re not alone. This common problem can be caused by a number of things, including poor fit, excess earwax, or an occlusion effect. This article will go over several of the most common causes and solutions to the problem. Read on to discover the best ways to reduce the noise and stop your hearing aids from whistling.

Poor fit

A bad fit of a hearing aid can affect the quality of hearing. A poorly fitted hearing aid may have too low a level to be effective. This is most likely the case for custom in-the-ear devices. Changing the ear mold or weight may also cause a poor fit. If this is the case, a higher MPO may be necessary. A poor fit can also cause feedback or whistling noises.

When hearing aids are not properly fitted, the effects are more likely to be negative than positive. The resulting noises are often not pleasant and can result in a range of symptoms including tinnitus. Improperly fitting hearing aids may also cause aural discomfort and dizziness. In addition to the discomfort, a poor fit can make the device ineffective. Dirt and moisture can also cause poor sound quality.

Excess earwax

You may experience excess earwax when wearing hearing aid, and you may wonder what you can do to reduce it. While it can be annoying, it can also seriously compromise your hearing. As earwax accumulates in your ear, it hardens, making it difficult to clean. The following are some tips to reduce this buildup and maintain a healthy hearing aid.

Limit the frequency of cleaning. Using too much of an over-the-counter cleaner may cause earwax to build up. Over-cleaning can lead to a reaction in your body that causes your ear canal to produce even more earwax. To reduce the amount of earwax in your ears, clean it as infrequently as possible. You may even want to consider buying a special cleaner that’s especially made for hearing aids to prevent excess buildup.

It’s essential to clean your ears thoroughly before you put your hearing aids in. Ear wax can block outward sound from your hearing aids and may even cause feedback. It’s also vital to have your hearing aids checked monthly. Moreover, it’s a good idea to use ear-wax removal products. When the buildup of earwax is excessive, the sound can be blocked and the person will have a whistling sound.

In addition to causing a variety of other issues, excessive earwax can also affect your hearing. If left untreated, it can lead to an ear infection or earwax buildup. Moreover, excess earwax can irritate your hearing and cause tinnitus, which is a ringing or buzzing sound that is not actually present. Moreover, the inner ear is vital for maintaining your balance, and if it’s clogged with excessive earwax, you may experience dizziness.

Improper fitting

If you hear whistling or feedback coming from your hearing aids, you may be experiencing an improper fit. Improper fitting of hearing aids is the most common cause of whistles. The reason behind this can be many, including a bad fit or an improper size of the device. While many cases of whistles can be resolved with a minor adjustment to the fitting, sometimes a complete remake is required.

Unlike feedback, a broken microphone can be corrected by inserting the receiver back into the BTE or ITE shell. However, it is not as easy as that. In the case of a detached microphone, the only way to fix it is to open the hearing aid case and physically reattach the microphone. However, this is not always possible and requires a specialist. This is why it is so important to find a qualified hearing healthcare professional who is able to make an accurate diagnosis.

If you suspect that you are experiencing whistling when your hearing aids are not properly fitted, visit your hearing care professional immediately. He or she will be able to identify the cause of your whistling and make the appropriate changes. However, a professional must strike a balance between comfort and proper fit. For instance, if your hearing aid is too loose, it will likely make the sound whistling louder.

Incorrect fit is the most common cause of whistling noises from hearing aids. Improper fit results in sound leakage and poor quality. Incorrectly fitting hearing aids can lead to noises that are both irritating and distracting. In addition, wax in the ear canal can also cause whistles. Moreover, it is vital to check the battery level of hearing aids to see whether you are in need of a new one.

Occlusion effect

One of the most common complaints about hearing aids is the occlusion effect. The occlusion effect occurs when hearing aids block the cartilaginous part of the ear canal, causing bone-conducted sound to be trapped. It is most noticeable at low frequencies, and offsets the natural level differences between consonants and vowels. It can cause a booming sensation when speaking, walking, and chewing.

Adaptive feedback reduction algorithms are used to reduce the acoustic feedback. Several manufacturers use phase cancellation strategies or redesigned sound delivery devices to reduce the occlusion effect. Stereo lithographic apparatus is another way to reduce the acoustic feedback. Whether the occlusion effect is a common or rare occurrence, hearing aids should be designed to minimize its effects.

Although the occlusion effect is not related to the vent effect, the feedback of the device can delay its processing. This can be problematic for the user because the noises they hear are not properly processed by their hearing aid. Adaptive feedback reduction algorithms reduce the occlusion effect, allowing users to wear hats and use the phone without discomfort. However, they should be used with caution and always seek professional advice before using hearing aids.

Besides the use of filters, another way to reduce the occlusion effect is to reconfigure the components of hearing aids. Conventional behind-the-ear hearing aids include a microphone, DSP unit, and receiver housed in a case. The output of the receiver is coupled to the tubing or custom earmold. A number of years ago, researchers tested the idea of reconfiguring hearing aid components. One reconfigured hearing aid featured a button receiver that received the processed sound via a wire and delivered it into the ear canal.

Venting in hearing aids

The degree of attenuation that a hearing aid experiences depends on its vent size and earmold fit. A vent diameter that is less than 1 mm reduces insertion loss, but more than that can reduce speech intelligibility. One study, by Dillon6, showed that insertion loss decreased as vent diameter increased. A tube-fitted device produces a real-ear occluded response (REOR), which is equivalent to the real-ear unaided response. A venting device with a shell or earmold occluding the ear results in a significant difference in REOR and REUR.

Typical vents are parallel, diagonal, and trench. These are all designed to reduce amplified low frequency sound. Vents allow pressure relief and help regulate the sound output. Venting is necessary for a closed ear canal because it can trap bone-conducted sound, which is produced by the condyle part of the mandible. This effect is especially noticeable when the wearer is talking. This noise can damage the hearing aid’s acoustical settings.

Increased vent diameter increases the risk of feedback and reduces the amount of usable gain in a hearing device. The highest usable high-frequency insertion gain of a tube-fitted hearing device was 19 dB. However, with active feedback cancellation, the available high-frequency gain is significantly higher than that of a closed earmold. The decrease in speech audibility occurs at frequencies between 2 and 3 kHz.

Although a direct impact of vent diameter on the effectiveness of signal processing algorithms, open-fitting hearing aids reduce the amount of noise that enters through the ear. In addition, open-fitting hearing aids reduce the sound output by 30 dB below 1000 Hz. Nevertheless, open-fitting hearing devices can still provide a significant directional benefit. In general, open-fitting devices must be carefully designed.

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