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Practical audio checks, explained plainly.
Short guides for using repeatable signals without turning a phone into something it is not: a certified acoustic calibrator.
Data
Local-first
Test context stays on device unless the user chooses to share it.Limits
No certified SPL
Digital signal control does not guarantee acoustic dBSPL output.Guide themes
Repeatability
Keep tone, noise, level, distance, room state, and meter settings consistent.
Measurement context
Record enough setup detail that the result can be interpreted later.
Honest limits
Separate useful comparisons from professional calibration or medical claims.
pink-noisespeakersroom-check
Using pink noise for speaker level checks
A practical workflow for using pink noise with a sound meter while avoiding claims that an iPhone can guarantee room SPL.
test-tonessound-meterworkflow
How to use repeatable test tones without overclaiming accuracy
Use SignalProof as a controlled signal source while keeping acoustic sound pressure claims tied to what the measurement setup can actually prove.
Local-first audio testing
Use SignalProof when you need the same signal twice, not a vague noise source.
Generate a tone, noise profile, or sweep, then record enough context to compare speakers, rooms, windows, doors, or meter readings later.