Adaptive room equalization using a speaker and a handheld listening device

A loudspeaker, comprising:

• a transducer for emitting sounds corresponding to a first segment of an audio signal;
• a wireless controller for receiving a sensed audio signal from a listening device, wherein the sensed audio signal represents the sounds emitted by the transducer corresponding to the first segment of the audio signal
• an adaptive filter for estimating an impulse response of a room in which the loudspeaker is located based on the first segment of the audio signal;
• an error unit for determining an error value for the estimated impulse response of the room based on the sensed audio signal, wherein the controller stores the impulse response and spectral characteristics of the first segment in response to (i) the error value being below a predefined error level and (ii) the impulse response being within a tolerance level of one or more previously stored impulse responses;
• and
• a content processor for processing a second segment of the audio signal based on a given one or more previously stored impulse responses, in response to determining that previously stored spectral characteristics, corresponding to the given one or more previously stored impulse responses, cover a predefined spectrum.

An article of manufacture for adjusting sound emitted by a loudspeaker in a room, comprising:

• a machine-readable storage medium that stores instructions which, when executed by a processor in a computer,
• characterize spectral characteristics of a first segment of an audio signal;
• receive a sensed audio signal from a handheld device, wherein the sensed audio signal represents sounds emitted by one or more transducers corresponding to the first segment of the audio signal;
• estimate, by an adaptive filter, an impulse response for the room based on the first segment of the audio signal;
• determine an error value for the estimated impulse response based on the sensed audio signal;
• store the impulse response and the spectral characteristics of the first segment in response to the error value being below a predefined error level and the impulse response being within a tolerance level of one or more previously stored impulse responses;
• and
• process a second segment of the audio signal based on a given one or more previously stored impulse responses, in response to determining that previously stored spectral characteristics, corresponding to the given one or more previously stored impulse responses, cover a predefined spectrum.