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*** Decibel on Top Gear! ***

Decibel was used to measure the sound of super sports cars on the Season Premiere of the BBC hit show Top Gear! We are VERY proud of this! The UK top gadget site "Pocket Lint" wrote about this here:

*** Decibel is HOT! ***

Since it's release, Decibel has been one of the Top Paid apps all over the world, including:

UK, Germany, Ireland, Sweden, Finland, Switzerland, Austria, Luxembourg, Brazil, Belgium, Netherlands, Denmark, Portugal and more!

*** MacWorld Review of Decibel! ***

Decibel was just reviewed by MacWorld (29/4) and received 4 out of 5 stars in a very nice review. Check it out here (Swedish content):

*** Breaking News! ***

Decibel was featured in the BBC show Panorama - The World's longest running investigative TV show on April 20! The host Quentin Letts use Decibel on his iPhone to measure decibel levels in regards to UK's health and safety regulations. Check it out on

*** iPod Touch users! ***

Please note that the iPod Touch doesn't have a built in mic! You will need an iPhone Headset or similar to be able to use Decibel. Most of the bad reviews are due to this fact. So please don't judge Decibel based on that. Thank you!


Have you ever wondered how loud a sound is? Screaming kids, a rock concert, sport fans screaming? Wonder no more. Measure it with Decibel!

- Analog decibel meter
- Digital meter with average, peak and max decibel
- A clean interface

More features:
- Support for turning upside down!
- Reset the Max value by tapping on it!
- Works for 2nd Generation iPod Touch (if using a iPhone headset with microphone)
- Support for disabling sleep mode
- Calibration

* Even though we have tested Decibel with professional grade equipment with good results, this application is for recreational use only. iPhone 3G is recommended since it has a better performing microphone than the first generation iPhone.

What's New in Version 1.12

* Minor bug fixes

iPhone Screenshots

iPhone Screenshot 1
iPhone Screenshot 2

Customer Reviews

Likely accurate -- maybe microphone limit peak readings?

I'm trusting the other reviewers who say that it matches up well with their bona fide decibel meters. If you're a musician, though, it may not be of much use if your ensemble is already loud. At our normal volume, we had it cruising above 95 dB and couldn't get a peak lower than its 105 dB limit. However, it was interesting, letting us see how often we were in the hazardous range. As a recreational app, it's good clean fun. It responds quickly and gives readings on par with common figures I've seen. If you really need dependable readings at loud volumes, you'll need to use a device built for it. Either this app or the iPhone's microphone is capping the upper limit.

Works as well as I expected

Surprisingly accurate. Tried it out on a new GE dishwasher which was supposed to run at 51 decibels. Had no idea what that was supposed to sound like. Found this app in iTunes and tried it out the next time the dishwasher ran. It showed 51 decibels about 1 inch in front of the unit, about the same as our new fridge. I am impressed!

Works really well and is very cool!

This works really well and seems very accurate too. I like you how can rotate your iPhone 180 degrees and point the microphone towards the sound source, and then the screen automatically rotates back. Also, the large numbers make the results very easy to read.

View in iTunes
  • $0.99
  • Category: Utilities
  • Updated:
  • Version: 1.12
  • Size: 0.2 MB
  • Language: English
  • Seller:

Compatibility: Requires iOS 2.2.1 or later. Compatible with iPhone, iPad, iPod touch (2nd generation), iPod touch (3rd generation), iPod touch (4th generation), iPod touch (5th generation), and iPod touch (6th generation).

Customer Ratings

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