What makes Hearing Aids Work?

<p>How Hearing Aids Function 

The public has had access to hearing aids for generations. In the beginning, the wearer would place a cone up to their ear which people would speak into. This would funnel the sound directly into your ear. Today’s hearing aids use much more sophisticated technology. So, in modern times, how do hearing aids work?

Hearing aids use small microphones to make a soft sound louder. The microphone is what does the trick. This device will receive the sound that comes in and convert it to an electrical or digital signal and send that data to a speaker where it is turned into sound once again. The person’s hearing loss is adjusted for by the microphone as well as the environment they are in. Environment here refers to how much and what kind of noise you are usually around. Are you usually near high frequency noises? Are these noises that you need to hear? To you tend to mainly be in places wear you mostly need to hear conversations? All these questions will help the audiologist adjust the settings on your hearing aid. This is just a partial explanation of the way hearing aids work. 

Hearing aids today make use of three technology types for the reception and conversion of sounds. Analog is the least sophisticated and this type of hearing aid is cheaper than the other. The audiologist can make adjustments to the hearing aid volume as well as make other minor tweaks. The product is then custom made for you in a factory. The volume is then either automatically controlled or controlled by the wearer.

Analog programmable circuitry is found in another type of hearing aids. These are somewhat better than the analog adjustable because they can be programmed by using a computer. Based on different situations, an audiologist can set different transmission and sound capture settings. A remote control can be used by the wearer to select among different programs.

Digital programmable hearing aids are the most advanced and, of course, the most expensive. Engineers tried for years and years to make digital models tiny enough to not be impractical. Fortunately, that is not an issue today.

So, how do these digital hearing aids work? Digital Sound Processing (DSP for short) is the key. A tiny computer chip processes sounds before they are amplified. Billions of calculations are done by the computer to make sure that sound settings are correct. Prior to being transferred to the ear, the digital data is converted to sound-waves. Feedback elimination is also a great feature of a digital hearing aid. There is very little adjustment necessary by a wearer of digital hearing aids.

Improvements in hearing aids have happened rapidly over time. There are many options today for people who need to improve their hearing. Today’s hearing aids, and how they work, can be summed up in one word – ‘technology’.

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