SELF-CALIBRATING LOUDSPEAKER SYSTEM
First Claim
1. 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 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.
6 Assignments
0 Petitions
Accused Products
Abstract
Systems and methods for calibrating a loudspeaker with a connection to a microphone located at a listening area in a room. The loudspeaker includes self-calibration functions to adjust speaker characteristics according to effects generated by operating the loudspeaker in the room. In one example, the microphone picks up a test signal generated by the loudspeaker and the loudspeaker uses the test signal to determine the loudspeaker frequency response. The frequency response is analyzed below a selected low frequency value for a room mode. The loudspeaker generates parameters for a digital filter to compensate for the room modes. In another example, the loudspeaker may be networked with other speakers to perform calibration functions on all of the loudspeakers in the network.
-
Citations
28 Claims
-
1. 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 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. - View Dependent Claims (5, 6, 7, 8, 9)
-
-
10. A system for calibrating a loudspeaker comprising:
-
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 configurable to adjust sound characteristics of the loudspeaker, and a self-calibration function to perform with the microphone in a selected listening area in a room, the self-calibration function operable to generate a test sound via the loudspeaker for pickup by the microphone and to analyze a test signal received by the microphone in response to the test sound 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 loudspeaker. - View Dependent Claims (11, 12, 13, 14, 15)
-
-
16. The system of claim 15 where the at least one calibration function includes a room mode correction function that analyzes the test signal by determining a frequency response, analyzing the frequency response at a low frequency range below a selected frequency to identify any room modes, and generating parameters for a digital filter to compensate for the room modes;
- and where the network calibration controller performs the room mode correction function for each loudspeaker.
- View Dependent Claims (2, 3, 4, 17, 18, 19, 20, 21, 22)
-
16-1. A method for calibrating a loudspeaker comprising:
-
connecting a microphone to the loudspeaker; placing the microphone in a listening area in a room; generating a test sound and receiving a test signal at the microphone in response to the test sound; determining at least one sound effect caused by the room at the listening area; and configuring the loudspeaker to compensate for the sound effects caused by the room by adjusting the sound characteristics of the speaker
-
-
17-2. The method of claim 16 further comprising initiating a self-calibration function before the step of generating the test sound.
-
18-3. The method of claim 17 where the step of initiating the self-calibration function includes the step of pressing a push-button mounted on the speaker.
-
18-4. The method of claim 16 where the self-calibration function includes a method comprising:
-
analyzing the test signal by determining a frequency response; analyzing the frequency response at a low frequency range below a selected frequency to identify any room modes; and generating parameters for a digital filter to compensate for the room modes.
-
-
23. A meter display on a panel of a loudspeaker, the meter display comprising:
-
a plurality of level values extending across the meter display; a level indicator to visually signal a parameter level by moving to one of the plurality of levels on the meter display; a meter display controller to convert a parameter value to a level signal indicative of the parameter level; and a meter display driver connected to the meter display to receive the level signal and drive the level indicator in accordance with the level signal. - View Dependent Claims (24, 25, 26, 27, 28)
-
Specification