SonicPro: Sound Level Meter

SonicPro turns your iPhone into a handheld sound level meter that keeps evidence. Open it, and the number in front of you is the sound around you. [Real-time Sound Level] Instant dBA, dBC and dBZ level with Leq, peak and min / max, plus a moving 10-second trend. Choose Fast, Slow or Impulse time weighting, and A, C or Z frequency weighting, the way a professional meter works. Overload and under-range are flagged so you know when a reading can be trusted. [Spectrum and Octave Analysis] A 72-band FFT spectrum with the dominant frequency marked, a scrolling spectrogram, and 1/1 and 1/3 octave band levels from 31.5 Hz to 16 kHz. You see not only how loud it is, but what it sounds like — which is what tells a fan from a drill from traffic. [Calibration] Fine-tune with a ±12 dB offset, or calibrate against a 94 dB reference source in about three seconds. Every session records the calibration…