Electronic method for reducing noise in the ear canal using feed forward techniques

摘要

A feed forward technique is used to provide active noise reduction within an ear canal blocked with a passive noise reducing apparatus such as an earplug. Sound outside the ear is monitored and converted into an electronic signal that is opposite in phase from the anticipated sound leakage in the ear canal. The electronic signal is converted back into sound and fed forward into the ear to provide a cancellation effect with the actual sound leakage.