Audio Low Pass Filter (PRO only) 音频低通滤波器（仅专业版）

The Audio Low Pass Filter filter passes low frequencies of an AudioSource, or all sound reaching an AudioListener, and cuts frequencies higher than the Cutoff Frequency.

音频低通滤波器（Audio Low Pass Filter ）， 通过音频源的低频率，或所有声音达到音频侦听器（AudioListener），并且衰减频率比截止频率高。

The Lowpass Resonance Q (known as Lowpass Resonance Quality Factor) determines how much the filter's self-resonance is dampened. Higher Lowpass Resonance Q indicates a lower rate of energy loss i.e. the oscillations die out more slowly.

低通共振品质（被称为低通共振品质因数）决定多少滤波器的自谐振被抑制。较高的低通共振质量（Lowpass Resonance Q ）表示能量损失率较低，振荡消逝更慢。

The Audio Low Pass Filter has a Rolloff curve associated with it, making it possible to set Cutoff Frequency over distance between the AudioSource and the AudioListener.

音频低通滤波器（Audio Low Pass Filter）有一个与它关联的衰减曲线，使它可以设置音频源（AudioSource）与音频侦听器（AudioListener）之间随距离的截止频率（Cutoff Frequency）。

The Audio Low Pass filter properties in the inspector.
检视面板的音频低通滤波器属性

Properties 属性

• Cutoff Frequency 截止频率 Lowpass cutoff frequency in hz. 10.0 to 22000.0. Default = 5000.0.
  低通截止频率在10.0～22000.0hz。默认=5000.0 hz。
• Lowpass Resonance Q
  低通共振品质 Lowpass resonance Q value. 1.0 to 10.0. Default = 1.0.
  低通共振品质值在1.0～10.0 。默认=1.0.

Adding a low pass filter 添加一个低通滤波器

To add a low pass filter to a given audio source just select the object in the inspector and then select Component->Audio->Audio Low Pass Filter.

要添加一个低通滤波器到一个给定的音频源，在检视面板选择对象，然后选择 组件 - >音频 - >音频低通滤波器。（Component->Audio->Audio Low Pass Filter.）

Hints 提示

• Sounds propagates very differently given the environment. E.g. to compliment a visual fog effect is to add a subtle low-pass to the Audio Listener.
  声音的传播在不同的环境是不同的。例如表达一个可视化的雾效果就是添加低通滤波器到音频侦听器。
• The high frequencies of a sound being emitted from behind a door will not reach the listener. To simulate this, simply change the Cutoff Frequency when opening the door.
  从门后发出的声音的高频率，不会达到侦听器。为了模拟这个，简单地在开门时改变截止频率（Cutoff Frequency）。