10-05-2021, 10:17 PM
(10-05-2021, 12:03 AM)Erik Josefsson Wrote: Further to solid's response in this thread, has anyone seen device-specific calibration data for the Audio Amplitude experiment? My Galaxy III has a "Reference SPL" default setting 60 dB (not sure what the "offset" below does?), but maybe that's a default value set for all phones?
The calibration tab could be used for a rather vague calibration of the audio amplitude, either by a reference sound of known SPL or by remembering a previously measured offset. Sebastian has tried to explain the limitations in the FAQ tab.
This gets particularly difficult now that we know about hardware variations in a device's lifetime, see https://phyphox.org/sensordb/ (Samsung Galaxy III could be any of the four –err, at least six different– GT-I930… or a SGH-I747M, tbc?).