AudioAnalyzer

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