Patent ID: 9621973
Date: 2017-04-11
CPC Classifications: B06B,G10K,H04R

Claim:
1. A device comprising: a first transducer configured to vibrate within a first frequency range to generate a signal audible by a wearer of the device; a first material on or near a first surface of the first transducer, the first material having an acoustic impedance at one or more frequencies within the first frequency range that is substantially similar to an acoustic impedance of the wearer's skin at the one or more frequencies; and a second material on or near at least a second surface of the first transducer, the second material having an acoustic impedance at one or more frequencies within the first frequency range that substantially differs from an acoustic impedance of an environment of the device; a microphone configured to receive from the wearer's body a reflected signal based on the generated signal: one or more non-transitory computer-readable storage media embodying software: and one or more processors that are operable to execute the software to: determine, based on the received reflected signal, a location of the device relative to at least one of the wearer's ears: and alter, based on the determined location, a frequency or an amplitude of the signal generated by the transducer.