Audio Tool v5.2.2 (Full Version)

Requirements: Android 1.5 and up
Overview: SPL & RT60 Meter, Spectrum Analyzer & Signal Generator

Features 1/3 octave, spectrogram, peak freq., fast, medium & slow filters, flat & A/C Weighting, Averaging, SPL Chart Recorder, White/Pink Noise, sine/square/triangle/ramp/impulse signals. Frequency spectrum store & load, von Hann windowing, "Keep Screen On"
Use: home theater, audio engineer, car audio, etc

AudioTools's Spectrum Analyzer component uses FFT on batches of samples recorded at the microphone. Hann windowing reduces aliasing. Recorded spectra may be stored as files on the SD card, and then loaded later and displayed together with the live spectrum.