Control method and system for outputting current environment confrontation noise based on noise reduction feedback
A control method and technology of the current environment, applied in the field of noise reduction, can solve the problems of driver interference, no output control method and system, and reduced driver prompt effect.
Active Publication Date: 2020-03-13
XCMG CONSTR MACHINERY +1
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Problems solved by technology
[0004]Aiming at some steady-state noises in the construction environment of road rollers, most of them are in the low-frequency band, including engine sounds from this machine, road pressure sounds, and roars from other construction machinery , these noises are mixed together, which brings relatively large disturbance to the driver
If there are some prompting sounds (often non-stationary sounds) in the environment, they will be covered up to a large extent by being mixed in these steady-state noises, thereby reducing the prompting effect to the driver
For the noise emitted by the native engine, it can be eliminated by engine sound suppression technology; however, for the noise emitted by the non-native engine, there is no good way to eliminate it
[0005] At present, there is no technical solution that can achieve noise reduction through active learning, specifically, there is no control based on noise reduction feedback to output the current environment against noise method and system
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[0037] In order to better clearly express the technical solution of the present invention, the present invention will be further described below in conjunction with the accompanying drawings.
[0038] figure 1 It shows a specific embodiment of the present invention, a specific flowchart of a control method based on noise reduction feedback to output the current environment against noise. Those skilled in the art understand that in the present invention, it is mainly used for road rollers to control the current application. The main reason is that the road roller will generate a lot of steady-state noise during the construction process, and for some steady-state noise in the construction environment of the road roller, most of them are in the low frequency band, including the engine sound emitted by the road roller itself. It also includes the sound of road pressure and the roar of other construction machinery. These noises are mixed together and bring relatively large disturba...
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The invention discloses a control method for outputting current environment confrontation noise based on noise reduction feedback, which realizes active noise reduction of an engineering vehicle basedon reinforcement learning, and comprises the following steps: a, generating confrontation noise matched with initial strategy information based on the initial strategy information; and b, determiningfinal strategy information based on the current environment changed against the noise and a reward function. The main idea of the invention is that a sound acquisition system arranged in a cockpit isused to pick up various noises in the environment, the noise is subjected to energy detection, noise distribution under each frequency and gain and phase information of each frequency point are acquired, features are extracted through a deep neural network, a confrontation noise sequence having a counteracting effect on current noise is generated, and a system can send out confrontation noise opposite to original noise through a loudspeaker according to the sequence so as to achieve the effect of real-time noise suppression. The method is simple to use and convenient to operate, and has extremely high commercial value.
Description
technical field [0001] The invention belongs to the technical field of noise reduction, and in particular relates to a control method and system for outputting current environment anti-noise based on noise reduction feedback. Background technique [0002] The noise in the car is an important factor affecting the driving experience of the user during the operation of the vehicle. When the noise is relatively loud, the user often cannot hear the sound of the outside world and the sound of other devices in the car, or even the passenger in the co-driver or the back seat. the sound of. [0003] As for the noise in the car, it is mainly generated by the engine of the vehicle and transmitted to the cabin. Vehicle manufacturers reduce the noise in the cabin through physical noise reduction. Physical noise reduction often isolates noise by installing sound insulation materials in the car, but the method of physical noise reduction will increase the weight of the vehicle, thereby i...
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IPC IPC(8): G10K11/178
CPCG10K11/1785G10K11/17821
Inventor金春晓
OwnerXCMG CONSTR MACHINERY