Hearing aid parts

Understanding hearing aid parts and their functions

Hearing aids are sophisticated devices designed to enhance your hearing by processing sounds in real time. Knowing the parts of your hearing aid can be helpful to describe issues to your audiologist and understand what parts could need replacement. In this guide, we’ll explore the essential parts of a hearing aid, from their internal components to external elements.

What are the parts of a hearing aid?

Hearing aids are made up of several components that work together to amplify and clarify sound. Each component plays a specific role in capturing, processing, and delivering sound to the ear. While designs can vary depending on the style of the hearing aid, the basic parts remain the same.

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Internal parts of a hearing aid

Inside a hearing aid, several essential components work together to capture and enhance sound. These internal parts process audio signals, amplify them, and deliver a clearer listening experience. Here’s a look at some of the key internal parts.

Hearing aid Microphone

The hearing aid microphone is responsible for picking up sound from the surrounding environment. Many modern devices feature a directional microphone hearing aid system, which helps focus on sounds coming from a specific direction while reducing background noise. Some advanced models also include a wireless microphone for hearing aids, allowing direct streaming from external audio sources for improved clarity.

Hearing aid Processor or chip

The hearing aid processor, also known as the digital chip, is the brain of the device, converting incoming sound into digital signals. A key technology used in modern devices is hearing aid DSP (digital signal processing), which enhances sound quality by filtering noise, adjusting frequencies, and improving speech clarity.

Hearing aid Amplifier

The amplifier boosts the processed sound signals to make them louder and clearer. It adjusts volume levels based on the user’s hearing needs, ensuring that speech and important sounds are more distinct.

Batteries

The battery powers the entire hearing aid, enabling all the internal components to function properly. Depending on the model, hearing aids may use disposable or rechargeable batteries for continuous performance.

External parts of a hearing aid

The external components of a hearing aid directly interact with the ear and play a key role in delivering sound. These parts ensure comfort, stability, and clear audio transmission. While designs may vary, most hearing aids share the following essential external elements.

Hearing aid case

The case houses and protects all the internal components of the hearing aid. It is designed to be durable, lightweight, and discreet, often made from materials that resist moisture and dust. Size varies depending on the hearing aid brand, as well as colors.

Hearing aid listening tube

A hearing aid listening tube is a thin, pastic-coated clear wire that connects the hearing aid to the earmold or dome. It helps direct sound into the ear while maintaining a discreet and comfortable design.

T-coil

The telecoil (T-coil) is a special feature in many hearing aids that allows users to connect to loop systems in public places, such as theaters and churches, for a clearer listening experience without background noise interference.

Hearing aid Wax guards: are they all the same?

Wax guards help prevent earwax from clogging the receiver and affecting sound quality. However not all hearing aid wax guards the same: hearing aid wax guard designs vary by brand and model, so it’s important to use the correct type for your device.

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Characteristic parts of hearing aid models

Each hearing aid model is distinctive, featuring specialized components that define its functionality and performance characteristics.Understanding the key components of your hearing aid is essential for proper maintenance. Below are some of the typical parts found in Receiver-in-Ear (RIC), Behind-the-Ear (BTE) and In-the-Ear (ITE) hearing aids.

Receiver-in-Ear (RIC) hearing aid parts

Domes: small silicone or rubber tips that cover the receiver and sit inside the ear canal. There are different hearing aid domes types, designed for various levels of hearing loss and comfort preferences. Choosing the right type can improve sound quality and overall fit.
Receiver: Also known as the hearing aid speaker, the receiver delivers amplified sound directly into the ear. The speaker receives the electrical signal from the amplifier and converts it back into acoustic energy. In receiver-in-canal hearing aids, the receiver is positioned inside the ear canal for a more natural sound experience and a discreet fit.

Behind-The-Ear (BTE) hearing aid parts

Earmold: A custom-shaped piece that fits inside the ear and helps secure the hearing aid in place, providing a snug fit and effective sound delivery.
Ear hook: The ear hook is a curved component that connects the case to the listening tube or receiver. It helps keep the hearing aid securely in place, particularly in behind-the-ear (BTE) models.
Button: Used to change volume or programs. The shape of the button can vary depending on the device and the settings defined by you and your audiologist.

In-The-Ear (ITE) hearing aid parts

Battery door: Where a new battery is inserted in non-rechargeable devices. The door is opened by pulling out on the notch.
Vent: The channel located at the bottom of the hearing aid allows low-frequency sounds to pass through and enables air circulation in the ear. The vent's size may vary based on your hearing levels. It is important to keep the vent free of debris using the brush's pick end. The second image provides a view of the vent from the opposite side.

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Hearing aid replacement parts

Each part of a hearing aid is crucial to maintaining its performance, and certain components, such as batteries, tubes, and ear domes, need to be replaced periodically.

If you're in need of replacement parts for your hearing aid, we recommend visiting your nearest Amplifon centre. Our experts can provide personalized advice and ensure you get the right parts for your specific model. Whether you need to replace a battery, wax guard, or any other essential component, our centres are equipped with everything you need to keep your hearing aids in top condition.

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FAQs on hearing aid parts

How often do you change wax guards on hearing aid?

Wax guards should be changed every 2 to 4 weeks, depending on individual earwax buildup. If you notice a decrease in sound quality or a blocked receiver, it's a good indicator that it's time to replace the wax guard.

How to clean hearing aid filters?

To clean hearing aid filters, gently remove the filter from the device and wipe it with a soft, dry cloth. If necessary, use a small brush to remove any debris. Avoid using water or cleaning solutions, as moisture can damage the hearing aid.

How often should hearing aid tubing be changed?

Hearing aid tubing should be replaced every 6 to 12 months, or sooner if it becomes cracked, discolored, or stiff. Regular checks for signs of wear will help keep your device working effectively and comfortably.

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