Patent ID: 9622006
Date: 2017-04-11
CPC Classifications: H04S

Claim:
1. A method for determining and applying a head-related transfer function (HRTF), said method including the steps of: (a) performing, in response to a signal indicative of an arrival direction, linear mixing using data of a coupled HRTF set to determine an HRTF for the arrival direction, where the coupled HRTF set comprises data values which determine a set of coupled HRTFs, the set of coupled HRTFs comprising a set of left ear coupled HRTFs and a set of right ear coupled HRTFs for a plurality of arrival directions which span a range of arrival directions, wherein the coupled HRTFs are determined from normal HRTFs for the same arrival directions by altering the phase response of each normal HRTF above a coupling frequency so that the difference between the phase of a left ear coupled HRTF and a right ear coupled HRTF for the same arrival direction is at least substantially constant as a function of frequency, for all frequencies substantially above the coupling frequency; and applying the HRTF for the arrival direction to at least one input audio signal to generate at least one output audio signal for application to at least one speaker or to or at least one amplifier and at least one speaker in series.