Method for masking undesirable disturbing noises and vehicle
AssigneeMercedes-Benz Group AG
InventorsThomas Küppers, Dirk Lieske, Alexander Treiber
Life of this patent
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Abstract
Synthetic noises are generated to mask undesirable disturbing noises arising during the operation of a vehicle. The synthetic noise is generated from an unmodulated synthetic noise to adjust a desired sound characteristic by multiplication with at least one filter and/or amplifier which is dependent on a vehicle parameter. A pitch of all acoustic signals of which the modulated synthetic noise is composed is kept constant during an emission of the modulated synthetic noise. The unmodulated synthetic noise is designed as 1/f noise, and is pre-modulated by at least one static filter before being modulated by the at least one filter and/or amplifier which is dependent on the vehicle parameter.
Claims18
A method comprising:
- masking undesirable disturbing noises arising during operation of a vehicle by emitting modulated synthetic noise,
- wherein the modulated synthetic noise is generated from an unmodulated synthetic noise to adjust a desired sound characteristic by multiplication, dependent on a vehicle parameter, with at least one filter or amplifier, wherein a pitch of all acoustic signals of which the modulated synthetic noise is composed is kept constant during the emission of the modulated synthetic noise,
- wherein the unmodulated synthetic noise is 1/f noise and is pre-modulated by at least one static filter before being modulated by the at least one filter or amplifier, and
- wherein the unmodulated synthetic noise is pre-modulated by the at least one static filter such that the pre-modulated synthetic noise comprises at least first and second acoustic signals, wherein the first acoustic signal has a first spectral width, the second acoustic signal has a second spectral width, the first spectral width corresponds to a frequency range of 0 to a maximum of 2200 Hz, and the second spectral width lies in a higher frequency range than the first spectral width, wherein the second spectral width completely comprises a spectral width of at least one disturbing noise to be masked.
A vehicle, comprising:
- a computer;
- at least one sensor coupled to the computer and configured to record a speed of the vehicle;
- and
- at least one loudspeaker coupled to the computer,
- wherein the computer and the loudspeaker are configured to
- mask undesirable disturbing noises arising during operation of a vehicle by emitting modulated synthetic noise,
- wherein the modulated synthetic noise is generated from an unmodulated synthetic noise to adjust a desired sound characteristic by multiplication, dependent on at least the recorded speed of the vehicle, with at least one filter or amplifier, wherein a pitch of all acoustic signals of which the modulated synthetic noise is composed is kept constant during the emission of the modulated synthetic noise,
- wherein the unmodulated synthetic noise is 1/f noise and is pre-modulated by at least one static filter before being modulated by the at least one filter or amplifier, and
- wherein the unmodulated synthetic noise is pre-modulated by the at least one static filter such that the pre-modulated synthetic noise comprises at least first and second acoustic signals, wherein the first acoustic signal has a first spectral width, the second acoustic signal has a second spectral width, the first spectral width corresponds to a frequency range of 0 to a maximum of 2200 Hz, and the second spectral width lies in a higher frequency range than the first spectral width, wherein the second spectral width completely comprises a spectral width of at least one disturbing noise to be masked.
Dependencies are inferred from the claim text.