Vehicle Headrest Acoustic Channels for Inter-Seat Isolation

The headrest is divided into multiple acoustic channels (first, second, third, and fourth channels) with specific transducers positioned in each channel. This segmentation allows independent control of acoustic radiation from different locations, enabling effective overall radiation while maintaining proper inter-aural balance through coordinated operation of the segmented channels.

Different regions of the headrest are assigned different acoustic functions through the segmented channel design. The first and second transducers serve one ear while the third and fourth transducers serve the other ear, creating local acoustic quality variations that maintain inter-aural performance while achieving effective overall radiation through the combined effect of all channels.

The acoustic channels are segmented and positioned to direct sound primarily toward the occupied seat. By dividing the radiation function across multiple channels with specific geometries, the system maintains inter-aural stability through coordinated output while limiting the spread of acoustic energy to adjacent seats through the directional characteristics of each segmented channel.

The acoustic channels are oriented at specific angles relative to the centerline of the headrest (first and second channels at first angles, third and fourth channels at second angles). This angular positioning in a different dimensional orientation allows the system to maintain inter-aural stability while directing acoustic energy in a controlled pattern that reduces leakage to other seats by exploiting the angular dimension.