Pointing
—
no compass
Band level
—

Settings

Band (Hz)
to

How to find the source
  1. Lock onto the tone: tap a detected tone chip, tap a peak on the spectrum, or drag across it to pick a band.
  2. Hold the phone up and turn slowly through a full circle, then back the other way. Keep your body behind the phone: it shadows sound from behind and makes the phone much more directional at high pitches.
  3. The radar and the beam mark the loudest bearing. Walk that way and scan again; the level should climb about 6 dB each time you halve the distance.
  4. Watch for reflections off walls. Several scans from different spots, crossing on a map, point to the source.

Noise Direction Finder

Overlays a live spectrum on the camera and maps how loud a chosen frequency band is in each compass direction, so you can turn toward a noise and follow it to its source.

Needs microphone, camera and motion-sensor access. Stay quiet while scanning: your own sounds land in the measurement.