Decibel X: dB, dBA Noise Meter

Decibel X: dB, dBA Noise Meter

By SkyPaw Co. Ltd

  • Category: Utilities
  • Release Date: 2011-11-05
  • Current Version: 7.0.0
  • Adult Rating: 4+
  • File Size: 24.40 MB
  • Developer: SkyPaw Co. Ltd
  • Compatibility: iOS 9.0+
Score: 4.5
From 53,696 Ratings


"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 - 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 - 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. - WAVE graph with 2 display modes: Rolling & Buffer - InstaDecibel to capture your dB report overlaid on photos and easily shared via popular social networks (Facebook, Instagram, Messages, etc.). - Support both Portrait and Landscape layouts - Beautiful, intuitive and carefully crafted UI design - Optimized for iOS 11 OTHER GREAT FEATURES: - Standard time weightings (Response Time): SLOW (500 milliseconds) and FAST (200 milliseconds) - Trimming calibration from -15 dB to 15 dB - Standard measurement range from 30 dBA up to 130 dBA - HISTO graph for plotted history of the recorded values - 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 - "Keep Device Stay Awake" option for long duration recording - Reset and clear current recording at any time - Tap on Max value to reset at any time - Pause/Resume the tool at any time 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. Get Decibel X Premium and enjoy: - Permanently remove all advertisements - Unlock ITU-R 468, A, B, C frequency filters - No limits when saving data * Choose from different subscription options. Our standard subscription options are: 1-month Subscription 1-year Subscription * Subscription payments will be charged to your iTunes account at confirmation of your purchase and upon commencement of each renewal term. Subscription with a free trial period will automatically renew to a paid subscription. You can cancel your subscription or free trial in the iTunes settings at least 24-hours before the end of the free trial period. The cancellation will take effect the day after the last day of the current subscription period and you will be downgraded to the free service. * Please note: any unused portion of a free trial period (if offered) will be forfeited when you purchase a premium subscription during the free trial period. * Privacy Policy: * EULA:


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Why most upgrades messed up how an app worked before?!?

I m using your free version for years. I was happy, i resisted to update, if it works why to risk, but this time i updated and what you did? You screwed up big huge time, i cannot find my saved files, some precious, my grandson first words, grand daughters cries and more. You tell me please how to recover those files.
By CrapApplication

It is a simple, yet useful tool.

Our use the app to quantify the complaint “it’s too noisy”. It allows me to put a number on how noisy a thing is so that I can compare it to how it sounds after I fix the noise, or to the sound of my normal speaking voice. The graphic display is useful for showing someone how loud it is, or isn’t. The best way to improve this app would be not to have pop up ads, that is an unreasonable expectation on a free app!
By Beckyboo-5


This is NOT the type of app I could use.. Please help! I’ve just been charged just because I opened the app. I opened it just so that I can continue to look and find a way to unsubscribe..and I get charged!!!! I want out of this!!!!
By hvvcgyfigh

Idk what to name it

This is the 1st dB meter that I’ve downloaded. I am pretty impressed with it it has a camera feature and it seems pretty reliable. One thing that I do not like is for over half of the features you need to buy there “premium”. Which I guess is normal for an app which is free. Overall a pretty good app.
By Look at me im mr.meseks


Great tool for middle school classroom management
By rbsms ils

It’s a trap

It’s Impossible to unsubscribe. You will be charged monthly starting three days after you install this app no matter what you do. It’s a trap app.
By Wolfsbro

Outstanding App!

I use this to monitor our church services during praise and worship. It has been very helpful in determining hot spots in our sanctuary as well as tune or room with correct speaker arrangement. This them allowed us to eliminate or greatly reduce the hot spots in our sanctuary. A more consistent sound level prevents the desire to just pump music at a higher level. Higher decibels doesn't improve sound it just makes the problem worse. I would suggest this app for anyone needing a highly accurate decibel meter.
By Tickntime

Used to be free.

This app previously was free. Now there is a message, try free for 3 days - then pay? Why should I pay now for the same service that used to be free.
By Teek-Geek

Frustrating if you change your mind

Overall I have only one gripe with the app. If you subscribe to the premium $4.99/month service, there is no way for you to unsubscribe. I changed my mind on the monthly fee service but I can’t cancel. Otherwise, the app is awesome.
By CFB2000

Rip off?

Cannot get to work on my iPhone although I have been charged for the pro version. Hope this is not another scammer.
By ugarf


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