Acoustic output device and method of controlling acoustic output device

A method, comprising:

• in an acoustic output device that includes a housing, one or more outward microphones on the housing, one or more internal microphones inside the housing, a plurality of drivers inside the housing, and circuitry:
• generating, by a first driver of the plurality of drivers, a first sound based on a wearing state of the housing, wherein
• the housing is associated with a listener, and
• the one or more outward microphones are toward an outer portion of the housing;
• collecting, by a first internal microphone of the one or more internal microphones, the first sound generated by the first driver;
• measuring, by the circuitry, in-ear characteristic of the listener based on the first sound collected by the first internal microphone;
• selecting, by the circuitry, a second driver of the plurality of drivers as a microphone;
• collecting, by the second driver, the first sound generated by the first driver, wherein
• the second driver is at a different position from the first driver;
• measuring, by the circuitry, the in-ear characteristic of the listener based on the first sound collected by the second driver;
• generating, by the circuitry, based on the first sound collected by the first internal microphone, a first acoustic control signal to control the first driver to reproduce an object sound source, wherein
• the reproduction of the object sound source is based on meta information of the object sound source;
• and
• generating, by the first driver, a first acoustic control sound based on the first acoustic control signal.

An acoustic output device, comprising:

• a housing;
• one or more outward microphones on the housing, wherein
• the one or more outward microphones are toward an outer portion of the housing;
• a plurality of drivers inside the housing, wherein
• a first driver of the plurality of drivers is configured to generate a first sound based on a wearing state of the housing,
• the housing is associated with a listener,
• the plurality of drivers includes a second driver, and
• the second driver is at a different position than the first driver;
• one or more internal microphones inside the housing, wherein
• a first internal microphone of the one or more internal microphones is configured to collect the first sound generated by the first driver;
• and
• circuitry is configured to:
• measure in-ear characteristic of the listener based on the first sound collected by the first internal microphone;
• and
• generate, based on the first sound collected by the first internal microphone, a first acoustic control signal, wherein
• the first driver is further configured to generate a first acoustic control sound based on the first acoustic control signal.