Acoustic Modes Viewer (v0.1.2 alpha)

This program is a simple viewer of power spectral density of sound. The package provides a module and a program to trace Fourier acoustic modes and resonance frequencies of excited bodies.

Use cases

• estimate length of an excited metal bar, guitar string, or
• measure frequency of flute tones,
• identify resonance frequencies and through provided sound speed the corresponding length scales of mechanical components that generate unwanted resonances (e.g. in a car as a function of speed cs)
• test 1/f noise and microphonic effects in electrical devices the program runs on.

Features

• Analysis of sound from microphone or from a file (WAV format)
• To analyze transient signals it keeps track of maximal peaks in processed spectra
• Saves recorded and processed data to files for further analysis
• Outputs list of peak frequencies (f) and corresponding wavelengths (l=cs/f)

Features that will be implemented

• Save animations of PSD response for video files (not implemented yet)

Installation

pip install acomod

Screenshots

Authors

Bartosz Lew (bartosz.lew@protonmail.com)