Decibel meter test vs Cepstrum

Decibel meter testing is a practical noise detection tool that helps you easily measure environmental noise levels. The main functions include: Decibel testing: Real time measurement of the decibel value of the current environment, providing accurate noise data. Surrounding noise detection: real sceneShoot and record the noise level of the surrounding environment. Test records: Automatically save historical measurement records for easy viewing and analysis at any time. Simple and easy-to-use, helping you better manage noisy environments. Download now and experience the precise noise measurement function! Subscription instructions: Subscription cycle price: consecutive weeks/48 yuan 24 hours before the VIP privilege expires, the iTunes account will be automatically charged and the renewal fee will be determined. Cancel automatic renewal: To cancel automatic renewal, please manually turn off the automatic renewal function in iTunes/Apple ID settings management 24 hours before expiration. If the subscription is not closed at least 24 hours before expiration, it will be automatically renewed. Privacy Policy: https://ucnscm5vnp13.feishu.cn/wiki/IxgSw8T29iJYeUkJMFzctlHNnGb?from=from_copylink Terms of Use: https://ucnscm5vnp13.feishu.cn/wiki/JZZKwLU0Dimit8kAncBcqAhdneH?from=from_copylink

That hum in your bedroom at night. The bass leaking through the wall. The "quiet" air purifier that isn't. Cepstrum shows you exactly what you're hearing — a live picture of sound, measured with nothing but your iPhone. SEE THE NOISE, NOT JUST HEAR IT A real-time spectrum from deep bass to the top of your hearing, with a sharpened spectrogram that turns tones into crisp lines. Point it at a mystery sound and get its fingerprint: the fridge hum at 50/60 Hz, the fan bearing whining at 4 kHz, the feedback frequency before it screams at your venue. KNOW HOW LOUD IT REALLY IS A proper sound level meter with A/C/Z weighting and Fast, Slow and Impulse response. Is the gym actually too loud? The restaurant? Your kid's headphones? Set the offset against a meter you trust and read real dB SPL — not a guess. PROVE THE DIFFERENCE Capture a measurement, overlay another, and read the change in decibels. Did the new windows cut the street noise? Is the replacement fan quieter than the old one? Before and after, one seat against another — the answer on screen, not in your head.