如何检测的打击Android设备的麦克风 [英] How to detect blow in android device microphone

问题描述

我如何检测，当用户进入吹设备的麦克风？然后，这将被用于触发由该应用的一些动作。

How can I detect when the user blows into the device microphone? This would then be used to trigger some action by the app.

推荐答案

的，当用户吹入麦克风检测的工作是可分离成两个部分：（1）从麦克风获取输入和（2）听音一个吹的声音。 有人吹麦克风的噪音/声音由低频率的声音了。我们将使用一个低通滤波器来降低高频声音的麦克风进来;当滤波后的信号尖峰我们就知道谁家吹入麦克风的水平。的

The job of detecting when a user blows into the microphone is separable into two parts: (1) taking input from the microphone and (2) listening for a blowing sound. The noise/sound of someone blowing into the mic is made up of low-frequency sounds. We’ll use a low pass filter to reduce the high frequency sounds coming in on the mic; when the level of the filtered signal spikes we’ll know someone’s blowing into the mic.

来源： <一href="http://mobileorchard.com/tutorial-detecting-when-a-user-blows-into-the-mic/">http://mobileorchard.com/tutorial-detecting-when-a-user-blows-into-the-mic/

修改 这里是一些小的 SoundMeter 的类Android版： <一href="http://$c$c.google.com/p/android-labs/source/browse/trunk/NoiseAlert/src/com/google/android/noisealert/SoundMeter.java?r=2">http://$c$c.google.com/p/android-labs/source/browse/trunk/NoiseAlert/src/com/google/android/noisealert/SoundMeter.java?r=2

EDIT And here is some small SoundMeter class for Android: http://code.google.com/p/android-labs/source/browse/trunk/NoiseAlert/src/com/google/android/noisealert/SoundMeter.java?r=2

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