Relation between Tension and Y-Axis value

2012 10 7
2 个回答
11 次查看（30 天）

0 个投票

Hi, there is a matematical relation beetween the tension of the output of a microphone read by matlab and the value on the y axis of matlab plot? if in y-axis of matlab i read 5, it means 5V of output of microphone? thanks Paolo

请先登录，再回答此问题。

回答（2 个）

Walter Roberson
Walter Roberson 2012-10-8

0 个投票

There can be, but it depends upon how you are doing the reading of the data, and what device you are reading from. It is not uncommon that the readings would be normalized to [-1, +1) or [-1, +1], or to 0 meaning no signal and ((2^bits)-1) meaning maximum signal that the ADC is configured to measure.
Usually when you want to know this kind of information, you also need to know the microphone pressure to signal curve. Most often the best way to get that is to calibrate with a reference source.
Paolo Rossi
Paolo Rossi 2012-10-9

0 个投票

hi! i save a .wav file on the PC and than i import it with wavread command, may be it's simpler calibrate it with reference..... thanks

类别

在 帮助中心 和 File Exchange 中查找有关 Digital Input and Output 的更多信息

产品

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by