InvisibleNoise

InvisibleNoise is a simple, real-time spectrum analyzer. It listens through your iPhone's microphone and draws a live graph of the frequencies it hears. - 48 colored bands, log-spaced from about 40 Hz to 16 kHz - Low frequencies at the bottom, high at the top; each bar's length shows how loud that band is - Smooth, responsive motion using a 2048-point FFT with a Hann window Audio is analyzed on your iPhone and never recorded, saved, or sent anywhere.