A method, system and storage medium for active noise reduction
An active noise reduction and noise reduction technology, applied in the field of noise reduction, can solve problems such as thread blocking, transmission delay, and the effect of active noise reduction needs to be improved, and achieve the effect of offsetting real-time changing noise and reducing transmission delay
Active Publication Date: 2022-04-01
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 present application relates to an active noise reduction method, system and storage medium thereof. The method includes establishing a data connection between a first computing terminal having an audio collection module and a second computing terminal connected to an audio player; through the first computing The terminal collects the noise audio signal in the preset space and analyzes and processes the noise audio signal, and generates a noise reduction signal for suppressing noise with the same frequency and amplitude as the noise audio signal and a phase difference of 180 degrees from the noise audio signal; The noise signal is transmitted to the second computing terminal, and the second computing terminal couples the noise reduction signal with the audio signal to be played and then plays it through the audio player. The present application can reduce the transmission delay, so that the noise canceling sound wave generated after calculation can well cancel the real-time changing noise, thus improving the effect of active noise reduction.
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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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