Patent ID: 9653062
Date: 2017-05-16
CPC Classifications: G10K,H04R

Claim:
1. A method of enabling a hearer to hear desired sound while also being able to be aware of ambient sound, comprising providing a first non-sound signal representative of said desired sound, deriving a second non-sound signal representative of said ambient sound without phase shift, combining the first and second non-sound signals in providing a combined non-sound signal, converting said combined non-sound signal into sound, and further comprising providing, for said second non-sound signal, a single threshold representative of a single threshold, for the volume and/or frequency of said ambient sound, or providing for said second non-sound signal, both of a lower threshold and an upper threshold representative of a single threshold, representative of a lower threshold and an upper threshold for the volume and/or frequency of said ambient sound, and providing, by phase-shifting, a third non-sound signal representative of a partially cancelling, ambient sound signal, and combining the first, second and third non-sound signals in providing said combined signal.