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音响系统与调音 PowerPoint PPT Presentation


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音响系统与调音. 主讲 刘日宇 . 第五章 音频信号处理设备. 5.1 动态处理器. 动态处理器包括有压缩器限制器扩展器噪声门等设备。. 1. 动态与动态处理. 电平、增益、动态范围 的单位都是 dB (分贝),但意义不同。 用音频信号在某一音响设备中(或某一模块单元)的输入和输出电平特性来描述三者的关系。. 增益 20db. 10dB. 其输入输出特性是斜率为 1 的直线,输入电平和输出电平对应坐标轴上的一个个点;输出电平与输入电平之差是增益,在斜率为 1 的线性放大中增益是一个定值;信号的动态范围是最大信号与最小信号之差。. -10dB. 50dB.

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音响系统与调音

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5.1


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1.

  • dB


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20db

10dB

  • 11

-10dB

50dB

50dB


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  • n:1n1


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  • :1


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  • 10:16:1


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  • 1: nn1

-20dB

20dB

40dB


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  • CompressorLimiterExpander

  • Compressor/Limiter:1


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  • CompanderCompander/Limiter


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  • Noice GateDucking


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2.


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  • 1Threshold


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2Ratio

2:1~6:12:13:1


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3Attack

1~5ms


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4Release

0.1~0.5s1s


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5Knee

hardsoft1~55

6Out Gain


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2.


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  • Dolby


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  • 1Threshold

    2Ratio

    3Attack1~5ms


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4Release

0.1~0.5s

5Knee

6Out Gain


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3.

  • Threshold


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  • :11:


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  • RangedB

- 10dB30dB


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5.2

  • ()()


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1.


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2.

  • :


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  • ()


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5.3

  • (Aural Exciter)


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  • :

    ()


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5.4


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  • ()


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  • (20Hz-20kHz)()LC


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  • Graphic Equalizer

    Q

  • Parameter Equalizer

    Q


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