Audio system with tissue transducer driven by air conduction transducer

A method comprising:

• generating, via a first surface of a diaphragm, a first set of airborne acoustic pressure waves;
• generating, via a second surface of the diaphragm that is opposite the first surface, a corresponding backpressure;
• and
• driving a tissue transducer using the backpressure to cause the tissue transducer to vibrate a tissue of a user, the vibrating tissue forming a second set of acoustic pressure waves, and the first set of airborne acoustic pressure waves and the second set of acoustic pressure waves together form audio content that is presented to the user.

An audio system comprising:

• a tissue transducer configured to be coupled to a pinna of an ear of a user;
• and
• a speaker coupled to the tissue transducer, the speaker including a diaphragm having a first surface and a second surface that is opposite the first surface, the first surface is configured to generate a first set of airborne acoustic pressure waves, and the second surface is configured to generate a backpressure,
• wherein the tissue transducer is driven by the backpressure to vibrate the pinna to form a second set of acoustic pressure waves, and the first set of airborne acoustic pressure waves and the second set of acoustic pressure waves together form audio content that is presented to the user.