Hearing Aid Compression, Digital Microphones & Noise Reduction-Hearing Aid Compression, Digital Microphones & Noise Reduction Slides

Hearing Aid Compression, Digital Microphones & Noise Reduction Slides

Pdf Summary

In this presentation, Ted Venema discusses the topics of hearing aid compression, digital microphones, and noise reduction. The presentation covers various aspects of compression, including linear gain, compression in analog hearing aids, compression for severe-profound hearing loss, compression for mild-moderate hearing loss, and compression in digital hearing aids. Venema explains that compression is primarily a gain issue, while signal-to-noise ratio is a different issue that will be covered in another webinar. He emphasizes the importance of understanding the difference between fitting the eye and fitting the ear, highlighting the role of outer hair cells in amplifying and sharpening the peak of the cochlea. Venema discusses various types of compression, such as output limiting WDRC and reduced dynamic range, and explains how they are used to amplify soft sounds and gradually decrease gain as inputs increase. He also explains the concept of knee points and shows how both linear gain and WDRC can be used to amplify different levels of input. Venema discusses the different ways of adjusting compression and the clinical application of compression for different types of hearing loss. He also mentions ADRO (adaptive dynamic range optimization) as an alternative approach to compression. The presentation concludes with a discussion on WDRC's impact on speech and the role of expansion in reducing internal noise.

Keywords

hearing aid compression

digital microphones

noise reduction

linear gain

analog hearing aids

severe-profound hearing loss

mild-moderate hearing loss

digital hearing aids

signal-to-noise ratio

fitting the ear