MATLAB: Data Returned By Audio Read

audioMATLAB

Hello all, I have a question in regards to audioread function in matlab (might be easy to some of you). Audioread('wave.wav') will return a normalized data of -1 to 1. So what exactly is this data type ? example if you measure vibration through use of vibration sensor, the data you can be be m/s (speed of vibration) etc or if you measure temperature using temperature sensor, you will get degree cel etc so if you use audioread on a wav file what is the data type (units) ?? It is sound pressure ?

Best Answer

The wav file contains the audio signal after the AD sampling. Then it means xVolt, where x is an an scaling factor, which depends on different values and does not matter for the processing. The value represents the amplitude of the sound, when recorded by the microphone, therefore it is actually a pressure.
Related Question