Nonlinear frequency compression (NFC) is an advanced technology used in modern hearing aids to improve sound quality and speech understanding for hard-of-hearing users. It is a method that compresses or reduces high-frequency sounds that people with hearing loss often have difficulty hearing or comprehending.
How Does NFC Work?
NFC works by lowering the high-frequency sounds to a lower frequency range where the wearer’s hearing may be better. For example, Phonak’s SoundRecover algorithm gradually lowers all frequencies above a cut-off. In the 2-4 kHz band, the signals are lowered to 2-2.8 kHz if the cut-off frequency is 2 kHz. By doing so, users can hear sounds that they would typically miss.
Benefits of NFC
- NFC enhances speech understanding and sound quality for people with hearing loss
- It offers a more natural hearing experience by improving the audibility of high-frequency sounds
- By reducing high-frequency sounds, NFC minimizes listening fatigue and improves listening comfort
What is the difference between linear and nonlinear frequency compression?
Linear frequency compression simply shifts high-frequency sounds down to a lower frequency without compressing them. Nonlinear frequency compression, on the other hand, compresses or reduces high-frequency sounds to a more comfortable and audible frequency range for the user.
Do all hearing aids have NFC?
No, not all hearing aids have NFC. However, most modern hearing aids now have this advanced technology that can greatly improve the quality of sound for people with hearing loss.
Nonlinear frequency compression (NFC) is a valuable technology that improves sound quality and speech understanding for hard-of-hearing users. It works by compressing or reducing high-frequency sounds that people with hearing loss often have difficulty hearing or comprehending. By using NFC, users can enjoy a more natural hearing experience, minimize listening fatigue, and improve listening comfort.