清空筛选条件
清空筛选条件

The fast fourier transform gives a jumbled order of peak frequency!

2 次查看（过去 30 天）
Samyukta Ramnath
Samyukta Ramnath 2013-2-26
I recorded notes from c to d on a musical keyboard and performed fast fourier transform on each of those notes. They had a lot of noise and the notes themselves had a non uniform, non repeating waveform. I logically expected the notes to have a peak frequency in increasing order from c note to b note... but the order that came out was something completely jumbled. What could be the reason for this?

请先登录，再回答此问题。

回答（1 个）

Walter Roberson
Walter Roberson 2013-2-26
Notes on keyboards are not pure sine waves. They have attack, sustain, decay, and harmonics. The peak frequency is going to depend on the envelope shape if you are using "peak frequency" to mean "maximum frequency". But perhaps you mean "frequency with the maximum energy" ?

类别

在 Help Center 和 File Exchange 中查找有关 Descriptive Statistics 的更多信息

标签

Community Treasure Hunt

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

Start Hunting!

Translated by