Patent ID: 8577048

Claim:
A loudspeaker comprising: at least one speaker; at least one audio input to receive an audio signal; at least one microphone input to connect to at least one microphone; a loudspeaker control system, mounted in the loudspeaker, the loudspeaker control system having an audio signal processor to process the at least one audio signal, the audio signal processor being configurable to adjust sound characteristics of the speaker; and the loudspeaker control system including a self-calibration function to perform with the at least one microphone in a selected listening area in a room, the self-calibration function operable to generate a test sound via the at least one speaker for pickup by the at least one microphone and to analyze a test signal received by the at least one microphone to determine at least one sound effect caused by the room at the listening area, and to configure the audio signal processor to compensate for the sound effects caused by the room by adjusting the sound characteristics of the speaker, where the self-calibration function includes a room mode correction function that analyzes the test signal by determining a frequency response, analyzes the frequency response at a low frequency range below a selected frequency to identify any room modes, and generates parameters for a digital filter to compensate for the room modes.