Active noise reduction method and system and storage medium thereof
A technology of active noise reduction and noise reduction, applied in the field of noise reduction, it can solve the problems of thread blocking, transmission delay, and the effect of active noise reduction needs to be improved, so as to achieve the effect of reducing transmission delay and offsetting real-time changing noise.
Active Publication Date: 2021-06-11
艾普科模具材料(上海)有限公司
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[0004] In view of the above-mentioned related technologies, the inventor believes that there are mobile phones in the car and other second computing terminals with acquisition microphones that run many APPs in the background at the same time, but the second computing terminals with acquisition microphones such as mobile phones are not a program with strict time allocation. Managed system, so between collecting sound and sending sound, the transmission delay is caused by thread blocking or process blocking of other codes. If the transmission is delayed, the noise-cancelling sound waves generated by the preset player cannot well offset real-time changes. noise, so the active noise reduction effect needs to be improved
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[0067] The following is attached Figure 1-3 The application is described in further detail.
[0068] The embodiments of the present application will be further described in detail below in conjunction with the accompanying drawings.
[0069] The embodiment of the present application discloses an active noise reduction method, such as figure 1 shown, including the following steps:
[0070] A data connection between the first computing terminal with the audio collection module 2 and the second computing terminal connected with the audio player is established. The first computing terminal can be a vehicle-mounted computer or a driving computer, the vehicle-mounted computer has a wireless connection module, such as a WIFI module or a Bluetooth module, the second computing terminal can be a smart phone, and the audio player can be a wireless audio player. The first computing terminal, The second computing terminal and the audio player can be interconnected in pairs. For exampl...
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The invention relates to an active noise reduction method and system and a storage medium thereof. The method comprises the following steps: establishing data connection between a first computing end with an audio acquisition module and a second computing end connected with an audio player; acquiring a noise audio signal in a preset space through a first calculation end, analyzing and processing the noise audio signal, and generating a noise reduction signal which has the same frequency and amplitude as the noise audio signal and has a phase difference of 180 degrees and is used for suppressing noise from the noise audio signal; and transmitting the noise reduction signal to a second calculation end, and the second calculation end coupling the noise reduction signal and an audio signal needing to be played and then playing the noise reduction signal and the audio signal through an audio player. The method has the advantages that transmission delay is reduced, sound waves which are generated after calculation and counteract noise well counteract noise changing in real time, and therefore the active noise reduction effect is improved.
Description
technical field [0001] The present application relates to the field of noise reduction, and in particular to an active noise reduction method, system and storage medium thereof. Background technique [0002] At present, the noise of automobiles mainly comes from several aspects such as road noise, tire noise, wind noise and engine noise. The noise control in the car compartment is a very important part of automobile technology. Noise, vibration and harshness are referred to as NVH , this is a comprehensive question to measure the quality of car manufacturing, and it gives car users the most direct and superficial feeling. The NVH problem of vehicles is one of the concerns of major vehicle manufacturers and parts companies in the international auto industry. [0003] The noise suppression in the existing automobile compartment is mainly by improving the sealing of the compartment, the shock absorption system of the chassis, the sound insulation effect of the engine compartme...
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Login to View More IPC IPC(8): H04R3/00G10K11/178G10L21/0208
CPCH04R3/00G10K11/178G10L21/0208
Inventor 满洪洋
Owner 艾普科模具材料(上海)有限公司