Price
iPhone audio signal generator
Repeatable test tones for speakers, rooms, and sound meters.
SignalProof generates controlled sine tones, pink noise, white noise, brown noise, and frequency sweeps so you can run practical audio checks with repeatable settings.
App Store listing for SignalProof: Audio Test Tone.
- Mode
- Pink noise
- Level
- -24 dBFS
- Sweep
- 40 Hz - 12 kHz
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.Current product proof
Evidence comes from shipped capabilities, not inflated acoustic claims.
SignalProof can control the digital signal side of a test. The measured acoustic result still belongs to the room, speaker, distance, volume, and meter setup.
Controlled signals
Tone, noise, sweep
Sine tones plus pink, white, and brown noise workflows.Repeatable setup
dBFS and frequency
Keep signal parameters consistent between measurement runs.Safer playback
Fade-in and limits
Start conservative and keep loud tone risk visible.Local context
Notes and reports
Record setup facts so comparisons stay interpretable.Use cases
Built for practical checks, not lab theater.
Speaker level checks
Play pink noise while you compare channel levels with SilentProof, another meter app, or an external SPL meter.
Room troubleshooting
Run sine sweeps or hold fixed frequencies to find obvious peaks, dips, buzzes, and resonance spots.
Isolation comparisons
Use noise on one side of a window, door, or wall, then compare measured changes on the other side.
Workflow
Generate, measure, record, repeat.
- 1Choose tone, noise, or sweep parameters.
- 2Play with fade-in and level guardrails.
- 3Measure with SilentProof or another trusted meter.
- 4Save the setup and export a local report.
Product truth
The important limits are part of the product.
SignalProof generates digital audio signals such as sine tones, pink noise, white noise, brown noise, and frequency sweeps.
The app can save local test context and export reports, but user data stays local in the MVP.
SignalProof 1.0 launches free with no StoreKit paywall or in-app purchases.
SignalProof is not a certified sound level calibrator, a medical hearing test, or a guarantee of acoustic dBSPL output.
Local-first by default
The MVP keeps test sessions and notes on device. The website exposes support pages and lightweight API endpoints.
Free at launch
SignalProof 1.0 is planned as a free iPhone app with no StoreKit paywall or in-app purchases.
Cloudflare companion site
Pages, FAQ, RSS, llms.txt, and /v1/health run from one Cloudflare Worker.
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.