Laboratory playback device and method of actual noise field

A noise field and laboratory technology, applied in the direction of sensor components, sensors, electrical components, etc., can solve the problem of insufficient coverage, non-directional and sufficient scattering of noise, and the inability to accurately and comprehensively measure communication terminal noise cancellation Performance and other issues, to achieve accurate measurement results

Active Publication Date: 2012-09-19
深圳市爱普泰科电子有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Before the present invention, the laboratory playback of the actual noise field is based on a two-channel noise data, and the playback of these noise fields has a large gap with the actual noise environment, and its reason is that the

Method used

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  • Laboratory playback device and method of actual noise field
  • Laboratory playback device and method of actual noise field
  • Laboratory playback device and method of actual noise field

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Such as figure 1 Shown:

[0028] The front end is respectively connected to the computer and the speaker; the front end has a multi-channel sound card and a control unit, the multi-channel sound card is connected to the speaker, and the control unit is connected to the multi-channel sound card; the computer includes a playback unit; the computer is connected to the control unit and the multi-channel sound card in the front end.

[0029] Eight speakers are arranged on a plane with a difference of 45 degrees along the circumference. The height of the plane is about one person’s height. The speakers have built-in or external power amplifiers; each speaker has a lead wire, which is respectively connected to the multi-channel sound card in the front end.

[0030] Such as figure 2 The noise playback process shown:

[0031] 1. The playback part in the computer controls the pre-stored noise file through the multi-channel sound card, and the multi-channel sound card controls ...

Embodiment 2

[0035] Such as image 3 Shown:

[0036] The front end is respectively connected with a computer, a speaker, a (standard) microphone, and an artificial head, and an artificial mouth is arranged on the artificial head; in the front end, there are multi-channel sound cards, near-end sound cards, signal acquisition components, and control components. The channel sound card and the signal collection part; the computer includes the playback part and the processing part; the computer is connected to the control part in the front end, the multi-channel sound card, the near-end sound card and the signal collection part.

[0037] 10 speakers, of which 8 speakers are arranged on a plane with a difference of 45 degrees along the circumference. The height of the plane is equal to the height of the artificial mouth set on the artificial head, that is, the 8 speakers are placed on the same plane around the artificial mouth ; The 9th horn is placed on the top of the center of the artificial ...

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Abstract

The invention relates to a laboratory playback device and method of an actual noise field. The front end of the laboratory playback device is respectively connected with a computer and a horn; a computer sends noise through the horn or the noise is acquired and then sent to a processing component in the computer for carrying out calibration, test and the like. The laboratory playback device and method solve the defects that noise is not definite in directivity and enough in scattering property, is static and insufficient in coverage surface and the like in the past. According to the invention, noise playback can effectively cover the actual noise field of a communication terminal using environment from a point noise source with definite directivity to nondirectional scattering noise, thereby providing a noise environment with effective, objective and accurate communication terminal denoising performance measurement, ensuring that playback of the laboratory noise field is accurately consistent with that of the actual noise filed, accurately measuring the denoising performance of the communication terminal and ensuring accurate, effective and objective results.

Description

technical field [0001] The present invention relates to a noise playback device, in particular to a laboratory playback device and method for an actual noise field. technical background [0002] The microphone noise cancellation solution has been applied by more and more communication terminals such as mobile phones, and its noise cancellation performance is also a very important indicator of communication terminals, and the laboratory playback of the actual noise environment is the measurement of the audio and noise cancellation performance of communication terminals such as mobile phones an important prerequisite. [0003] Before the present invention, the laboratory playback of the actual noise field was all based on a two-channel noise data, and the playback of these noise fields had a large gap with the actual noise environment, and its reason was that these noises did not have clear directionality And sufficient scattering, and they are all static, so the coverage is ...

Claims

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Application Information

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IPC IPC(8): H04R29/00H04R3/00
Inventor 张铭林松蓝晖
Owner 深圳市爱普泰科电子有限公司
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