Calibration method and device in an audio system
First Claim
1. A calibration method in a sound-reproduction system, in which an electrical calibration signal is formed, an audio signal is formed in a loudspeaker from the calibration signal, the response of the audio signal is measured and analysed outside the loudspeaker by an electronic means, and the system is adjusted on the basis of the measurement results by the electronic means, wherein:
- the calibration signal is formed in the loudspeaker in such a way that it is essentially a sinusoidal signal, the frequency of which scans at least substantially through the entire audio frequency range.
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Abstract
The present publication describes a calibration method and apparatus, in which an electrical calibration signal is formed, an audio signal is formed in the loudspeaker from the calibration signal, the response of the audio signal is measured and analyzed, and the system is adjusted on the basis of the measurement results. The calibration signal is formed in the loudspeaker in such a way that it is essentially a sinusoidal signal, the frequency of which scans at least substantially through the entire audio frequency range.
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Citations
25 Claims
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1. A calibration method in a sound-reproduction system, in which an electrical calibration signal is formed, an audio signal is formed in a loudspeaker from the calibration signal, the response of the audio signal is measured and analysed outside the loudspeaker by an electronic means, and the system is adjusted on the basis of the measurement results by the electronic means, wherein:
the calibration signal is formed in the loudspeaker in such a way that it is essentially a sinusoidal signal, the frequency of which scans at least substantially through the entire audio frequency range. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 25)
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10. A calibration apparatus in a sound-reproduction system, which comprises a loudspeaker, control apparatus for the loudspeaker, signal and control connections to the loudspeaker, a microphone for measuring the response of the loudspeaker, and analysis and control apparatuses in an electronic device outside the loudspeaker for analysing and setting the signal obtained from the microphone, on the basis of the analysis results, wherein:
the loudspeaker has means for forming an essentially sinusoidal electrical variable-frequency calibration signal, so that the calibration signal scans essentially through the entire audio-frequency range. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A loudspeaker, which comprises an element producing sound, adjustment and control devices for controlling the sound-producing element, and signal and control connections for connecting to an electronic means to the loudspeaker, wherein:
the loudspeaker has means for forming an essentially sinusoidal electrical variable-frequency calibration signal, so that the calibration signal scans at least substantially over the entire audio frequency range. - View Dependent Claims (21, 22, 23, 24)
Specification