Improved localization in the median plane with cue-preserving headphones
* Presenting author
Headphone based binaural reproduction of sound sources from directions in the median plane are rarely perceived from the intended direction, as in this case there are no interaural time or level differences.In a real-world scenario, the only perceivable cue is the individual spectral coloration of the source signal, which is mainly caused by the listeners pinna.Typically, the usage of individual head-related transfer functions (HRTFs) improves the conformance of perceived and intended sound source direction.However, the individualization of binaural audio reproduction requires time-consuming measurements of the individual HRTFs for each user. This study examines the localization improvement by activating individual directional cues with tiny loudspeakers in the closest sagittal plane in front and above the ear added to a conventional headphone. In an informal listening test this specific hardware setup has been examined by nine (male) experienced listeners.Since our concept tries to profit from both conventional dynamic loudspeakers (basically low frequencies) and MEMS loudspeakers to activate individual directional cues related to Blauert's directional bands the optimal operation range of the MEMS loudspeakers has been set to the frequency range from 1.6 to 10 kHz.