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Decibel X:dB Sound Level Meter app for iPhone and iPad


4.2 ( 832 ratings )
Utilities Productivity Education
Developer: SkyPaw Co. Ltd
Free
Current version: 9.7.0, last update: 5 months ago
First release : 05 Nov 2011
App size: 56.27 Mb

"Decibel X" is one of very few noise meter apps on the market that has highly reliable, pre-calibrated measurements and supports dBA, dBC. It turns your iOS device into a professional sound level meter, precisely measures the sound pressure level (SPL) all around you. This extremely useful and beautiful tool will not only be a great tool for many uses but also bring you a lot of fun. Have you wondered how quiet is your room or how loud is a rock concert or sport event? "Decibel X" will help you answer all of those.

WHAT MAKE IT GREAT AND STAND OUT FROM OTHER APPS:

- Trusted accuracy: the app is tested and pre calibrated for all Apple devices. The precision is matching with real SPL devices
- Apple Watch support: see noise level right from your wrist
- Health App integration: export noise levels directly into Health app
- Frequency weighting filters: ITU-R 468, A, B, C, Z
- Powerful, smart history data management:
+ Recording data can be saved into a list of history records for future access and analysis
+ Each record can be exported as hi-res PNG graph or CSV text via sharing services
+ iCloud support which synchronize all history records across your Apple devices
+ Fullscreen mode to give overview the whole history of an record
- Dosimeter with NIOSH, OSHA standards
- Powerful calibration: Linear, Octave 1/1, 1/3, Load/save profile
- FFT and BAR graphs to display real time FFT. Those are very useful for frequency analysis and musical tests. Real time predominant frequency is also displayed.
- InstaDecibel to capture your dB report overlaid on photos and easily shared via popular social networks (Facebook, Instagram, Messages, etc.).
- Support Live Activity, Dynamic Island
- Support both Portrait and Landscape layouts
- Beautiful, intuitive and carefully crafted UI design. Themes: LIGHT, DARK and CLASSIC

OTHER GREAT FEATURES:

- Standard time weightings (Response Time): SLOW (500 milliseconds), FAST (200 milliseconds) AND IMPULSE (50 milliseconds)
- MIC Gain Offset from -50 dB to 50 dB
- Standard measurement range from 30 dBA up to 130 dBA
- HISTO graph for plotted history of the recorded values
- WAVE graph with 2 display modes: Rolling & Buffer
- SPECTROGRAPH
- Real time scale level chart
- Display Current, Average/Leq, and Max values with both nice and clear digital and analog layouts
- Quick reference text to help you compare with real-life examples

NOTES:

- Please do not expect a quiet room reading will be 0 dBA. The range 30-130 dBA is the standard usable range and an average quiet room will be about 30 dBA.
- Although all devices are pre-calibrated, custom calibration is suggested for serious purposes requiring higher precision and accuracy. You will need a real external device or calibrated sound meter as a reference, then adjust the trimming calibration until the reading matches with the reference.

* Privacy Policy: http://www.skypaw.com/decibelx/privacy_policy.html
* EULA: http://www.skypaw.com/decibelx/terms.html

Pros and cons of Decibel X:dB Sound Level Meter app for iPhone and iPad

Decibel X:dB Sound Level Meter app good for

Easy as pie--open it, it works. No clutter, no nonsense, so simple its hard to believe in this world of "Why make it simple when its so trendy to complicate." Three cheers for the developers.
I use this app to measure the sound level in my car. Using it to compare sound levels of different cars as I am looking to buy a new car. So as long as the comparative approach works, the accuracy of the actual measures t is not as important to me. Although it does appear accurate. I have also used it to measure the sound level of my band when we jam. The layout is nice, keeps the max value displayed and allows you to reset it. Shows a graph at the same time and you can export and email the data from the graph in csv format. You dont need to pay for a sound level app this will do it for you. I tried about ten other free apps before I found this one. Ive deleted all the other sound level apps except this one.
This is a great little app. I read in the release notes for the update Push Notifications removed which makes me sad because I liked them. Why not just add on/off toggle?
Works great compared it to a $500 unit at work and it is just as good
Im in health and safety and use this app often. We have tested against a calibrated dosimeter. Its spot on. Excellent for determining hearing protection levels. The workers are always impressed when they watch the needle and see the levels. No arguments after about levels. Im using an iPhone 6+, btw.
It really work extremely well when you want to fix sound. As a producer live event, we use this simple app to measure sound.

Some bad moments

The app does not work any more since the last update concerning Ads ! THIS IS THEFT !!!
Middle range due to asking with importunity for a review. Please be less pushy.
The shown values are much too high and way off (50-60 in completely quiet environment). 1 star for the nice app icon.
This is not accurate at all, reads 60 decibels in a quiet room. Not only that you get ads constantly while using it, trying to force you to upgrade.
I find this app very helpful with my hearing health no because it will not register the louder sounds and maybe not accurate
This was a great app but like everyone else the adds have made the app useless so time to delete it

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