SPLnFFT Noise Meter for Android

11 things about SPLnFFT Noise Meter

1. A test tone at 1kHz or a white noise or a pink noise can be generated and sent to right and/or left outputs (select the type you want in BEEP tab).

2. This FFT view - more precisely an upsized version of it - can be exported as a picture in your own photo library, using the camera button (when display is frozen only).

3. Professional users will take advantage of a wide range of accurate and reliable measurements: Leq, peak, L10, L95, taktmaximal, frequency analysis, histogram, dosemetering, ... A&C weightings are compliant with ANSI® S1.42 standard.

4. Top digital display is for measurement of sound power in 'slow' mode (averaged on 1s).

5. Thus if you want to hear a real white or pink noise, you will need to use a quality headphone or HiFi system.

6. Blue line is a copy of what the purple line was when the user froze the display the last time.

7. If your input signal is a pure tone then this App will lock on its frequency and display a very accurate result.

8. As for ALL sound meters (thus including this one and all others at any price), calibration is suggested if you want to reach extreme precision.

9. But it can display 'slow' mode as well on request: just click on 'fast' label.

10. How to ? For calibration, you need and external reference, either a calibrated sound meter, or a calibrated noise source.

11. The display can be flipped upside-down to ease reading: just rotate your iPhone while holding it vertically.