How to measure noise or sound and displays in dB(A) in iphone?
问题 I want to measure sound in dB(A) in iPhone. How can I do it? Is there any example or tutorial? 回答1: If you use AVAudioPlayer, you can use this method AVAudioPlayer *avPlayer = ... [avPlayer play...]; [avPlayer averagePowerForChannel:0]; [avPlayer averagePowerForChannel:1]; From Apple's doc - (float)averagePowerForChannel:(NSUInteger)channelNumber Description Returns the average power for a given channel, in decibels, for the sound being played. 来源: https://stackoverflow.com/questions/6183599