Method and device for identifying squeaking noises
First Claim
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1. A method for detecting squeaking noises within a sound signal generated during operation of at least one of (a) a motor vehicle and (b) at least one component of a motor vehicle, comprising:
- detecting the sound signal;
generating an amplitude spectrum of the sound signal representing an amplitude distribution in a frequency range at a minimum of two points in time;
forming a smoothed amplitude spectrum from each of the at least two amplitude spectra; and
detecting an existence of a squeaking noise by analyzing the at least two amplitude spectra and the at least two smoothed amplitude spectra, wherein;
the existence of a squeaking noise is detected by analyzing signal peaks in the amplitude spectra and comparing the signal peaks to values of the signal ascertained from the smoothed amplitude spectrum.
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Abstract
A method for detecting squeaking noises within a sound signal generated during operation of a motor vehicle or during operation of a component thereof is described; in this method the sound signal is detected; an amplitude spectrum of the sound signal representing the amplitude distribution in a frequency range is generated at a minimum of two points in time and the existence of a squeaking noise is detected by analysis of the at least two amplitude spectra.
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Citations
19 Claims
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1. A method for detecting squeaking noises within a sound signal generated during operation of at least one of (a) a motor vehicle and (b) at least one component of a motor vehicle, comprising:
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detecting the sound signal; generating an amplitude spectrum of the sound signal representing an amplitude distribution in a frequency range at a minimum of two points in time; forming a smoothed amplitude spectrum from each of the at least two amplitude spectra; and detecting an existence of a squeaking noise by analyzing the at least two amplitude spectra and the at least two smoothed amplitude spectra, wherein; the existence of a squeaking noise is detected by analyzing signal peaks in the amplitude spectra and comparing the signal peaks to values of the signal ascertained from the smoothed amplitude spectrum. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method for detecting squeaking noises within a sound signal generated during operation of at least one of (a) a motor vehicle and (b) at least one component of a motor vehicle, comprising:
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detecting the sound signal; generating an amplitude spectrum of the sound signal representing an amplitude distribution in a frequency range at a minimum of two points in time; and detecting an existence of a squeaking noise by analyzing the at least two amplitude spectra, wherein; the existence of a squeaking noise is detected by analyzing signal peaks in the amplitude spectra; to detect the existence of a squeaking noise, signal peaks within a same frequency interval are detected for a predetermined minimum number of analyses of chronologically successive amplitude spectra, and a signal peak is detected as being present in a frequency interval when; an ascertained value of the signal peak in the frequency interval exceeds a preselectable threshold value; and the ascertained value of the signal peak is greater by at least a preselectable value than a value of a corresponding signal at edges of the frequency interval, the preselectable value at least one of (a) equaling 14 dB and (b) between 7 dB and 17 dB. - View Dependent Claims (16)
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17. A method for detecting squeaking noises within a sound signal generated during operation of at least one of (a) a motor vehicle and (b) at least one component of a motor vehicle, comprising:
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detecting the sound signal; generating an amplitude spectrum of the sound signal representing an amplitude distribution in a frequency range at a minimum of two points in time; and detecting an existence of a squeaking noise by analyzing the at least two amplitude spectra, wherein; the existence of a squeaking noise is detected by analyzing signal peaks in the amplitude spectra; to detect the existence of a squeaking noise, (i) signal peaks within a same frequency interval are detected for a predetermined minimum number of analyses of chronologically successive amplitude spectra, and (ii) a deviation quantity that characterizes a mean deviation of the frequency of the detected signal peaks from a mid-frequency of the frequency interval is ascertained; the existence of a squeaking noise is deduced as a function of the deviation quantity; and the existence of a squeaking noise is inferred if the deviation quantity exceeds a preselectable threshold value in a direction such that the deviation belonging to the deviation quantity is increased.
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18. A device, comprising:
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an arrangement configured to perform a method for detecting squeaking noises within a sound signal generated during operation of at least one of (a) a motor vehicle and (b) at least one component of a motor vehicle, the method including; detecting the sound signal; generating an amplitude spectrum of the sound signal representing an amplitude distribution in a frequency range at a minimum of two points in time; forming a smoothed amplitude spectrum from each of the at least two amplitude spectra; and detecting an existence of a squeaking noise by analyzing the at least two amplitude spectra and the at least two smoothed amplitude spectra, wherein; the existence of a squeaking noise is detected by analyzing signal peaks in the amplitude spectra and comparing the signal peaks to values of the signal ascertained from the smoothed amplitude spectrum. - View Dependent Claims (19)
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Specification