How Digital Hearing Aids Benefit Your Customer’s Needs
Four components make up a digital hearing aid:-
- Power supply
With respect to digital hearing aids, the critical component is undoubtedly the amplifier which essentially acts as a digital brain and master computer. In a digital hearing device, audio waves are picked up by the microphone, and through a process called digital signal processing (DSP) the original sound wave is digitized and cleaned up. This new, clean, digital signal is then converted back into audio waves and is transmitted into your ears. As you can see, it doesn’t merely make sounds louder; it affords an array of signal processing to allow the user to hear frequencies that are relevant to their impairment.
However, not all digital hearing aids are created equal, and some manufacturers offer functionality that vastly improves sound capture and quality of speech like, automatic volume regulation, noise management and feedback suppression.
The following is a basic schematic of how a digital hearing aids work:-
- The internal microphone detects sound waves.
- The processing microchip monitors these sounds waves and converts them into a digital copy.
- Processed sounds are sent to the amplifier.
- Depending on the user’s settings, the amplifier can choose to amplify specific frequencies and delete unwanted sounds; then the digital signal is sent to the loudspeaker.
- The loudspeaker delivers the clean sound to the ear via various methods depending on the device.
Digital hearing aids offer a significant improvement over analogue hearing aids, and some of the most common features and capabilities are listed below.
Analogue hearing aids can sometimes whistle; this whistle is called feedback. Digital hearing aids can detect this feedback and deny it from ever reaching the user while still allowing soft speech to pass.
These components allow the user to focus on specific sounds within an environment. Traditionally with analogue devices, a user had to push a button, but with modern digital instruments this is all programmed and carried out automatically.
Music is very different from speech, and early digital and analogue devices struggled to cope with the nuances of a musical signal. However, music detection and processing today is far superior, and these modern devices have specific programmes for dealing with it.
In the modern world, it’s vitally important that digital hearing devices can integrate with the everyday items we use like smartphones. Most digital hearing aids come with downloadable apps that control the settings and programs used to optimise the listening experience.
Most digital hearing devices contain an electromagnetic induction coil (telecoil). This component makes it easier to understand speech on a cell phone or a landline telephone. Simply place the phone next to the device. However, there are telecoil compatible telephones that are specifically designed for this purpose.