How Do Hearing Aids Operate? 

Hearing aids have been around for decades. The earliest models were very crude and consisted of a cone users would use to listen with. Sounds would be funneled straight into the ear. Now there are more impressive types of hearing aids, working with a higher degree of technology. So, what makes today’s hearing aids work the way they do?

Tiny microphones within hearing aids cause sound to be amplified. The tiny microphone is the key here. 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. The person’s environment involves how much noise they are typically surrounded by. Are the noises around you usually those with frequencies that are high? Is it necessary for you to hear those noises? Do you function mainly in a quiet conversational environment? These are questions that will help your audiologist make the proper adjustments to your hearing aid. This only partially explains the workings of a hearing aid. 

Today’s hearing aids make use of three kinds of technology for the receiving of and converting of sound. Analog is the least sophisticated and this type of hearing aid is cheaper than the other. An audiologist can adjust the volume with the hearing aid and other minor specs. The factory will then custom make it for you. You can control the volume, or it will be controlled automatically.

Other types of hearing aids use analog circuitry which is programmable. They are somewhat better than traditional analog due to the usage of computer programming. The audiologist sets different programs of sound capture and transmission for different listening situations. The user can select which program to use at any given time by using a remote control.

The most advanced hearing aids use digital programming, and they also cost the most. For years they were impossible and then they were impractical because they couldn’t be made small enough. Fortunately, that is not an issue today.

Then, how do digital hearing aids operate? Digital Sound Processing (DSP for short) is the key. They utilize a computer chip to analyze and process the sound data before it is amplified to the ear. The computer does hundreds of millions of calculations to get the settings correct for each sound. This digital data is then converted into sound and sent on to the ear. The digital hearing aid also has the capability of detecting and eliminating feedback by identifying its frequencies. Digital hearing aids wearers benefit from very little need to make any type of adjustment.

Improvements in hearing aids have happened rapidly over time. Today, people with hearing loss have lots of options. Today’s hearing aids, and how they work, can be summed up in one word – ‘technology’.