AudioAnalyzer

Simple tool to visualize and/or generate audio signals on a mobile phone.

This Software records audio with 44.1 kHz from the built-in microphone of the mobile phone or from an external microphone and visualizes the signal as spectrum. It also contains a Signal generator for sinusoidal or other waveforms.

Note: Tested on Mobile Phones only - might not work on Tablets.

Signal analyzer Features:

* variable fft size from 128 to 8192 points

* selectable window function (rectangular, Hann, Hamming, Blackman,...)

* linear or logarithmic frequency display

* display as spectrum or as intensity color plot vs. time

* display 1/3 octave spectrum

* can be calibrated for sound pressure (requires calibration hardware)

* Different weighting functions (A/B/C) and frequency integration ranges with peak hold

* Plot integrated/weighted Signals over time

Integrated signal generator Features:

* Two independent signal generators - one can be used as modulation source for the other

* Sine/Triangle/Saw/Pulse Waveforms

* AM/FM/PM/PWM Modulation

* Frequency Sweep (linear or logarithmic)

Swept Frequency Analyzer

* Sweep Sinusoidal Signal with configurable number of steps, linear or logarithmic

* Record amplitude

Report Generator

* Store multiple sets of up to 4s of Audio Signal and compare the spectra and the time signals

* Store the recorded data on the file storage, as (HTML) Report File and as WAV-File

Open Source: https://github.com/101010b/AudioAnalyzer