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With dB Volume you turn your iPhone into a Sound Pressure Level (SPL) Meter. You can choose between the industry standard weighting curves and response times.

Use dB Volume for measuring environmental noises - it offers now Leq measurement!

dB Volume features:
- response time modes: impulse, slow, fast
- weighting functions: A B C Z (unweighted)
- peak hold function
- Leq measurement

We calibrated dB Volume as carefully as possible for all available devices. But: keep in mind, that due to manufacturing tolerances this calibration does not necessarily apply to your device – it’s still an iPhone, iPod touch or iPad and not a calibrated measuring instrument!

What’s New

Version 2.4

optimized for iOS 9.3

Ratings and Reviews

3.4 out of 5
10 Ratings

10 Ratings

Db man 77 ,

Sound engineer

Nice meter, but sensitivity is way off. The A weighting is 3db low, the B weighting is 10db low, the C weighting is 15db low. I checked with a calibrated Simpson 886 sound level meter. It would be nice if a calibration feature was included so that it could be adjusted to agree with a professional meter. With a C noise level of 50db, this meter says it's 35db.

MEEKO {D187} ,

Works, but could be more accurate.

The A, B, and C weightings are off. I am convinced that the meter is off just a tad bit. I use this on my iPhone 5S with iOS 10. Today I'm writing on March 29, 2017. So yes, it works but with some little improvements this app would be phenomenal.

nyimht ,

Best Free iPhone SL Meter

I've tried almost every Free Sound Level Meter and this one was the most accurate when compared to my EXTECH Digital Sound Level Meter. I normally keep it on Slow response and A Weight. Although you're getting readings from the built-in iPhone mic, it is very useful for small situations (i.e. home monitor setup.)


DSP Mobile UG (haftungsbeschraenkt)
19.8 MB

Requires iOS 8.0 or later. Compatible with iPhone, iPad, and iPod touch.


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  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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