Decibel X:dB Sound Level Meter

Decibel X:dB Sound Level Meter

Decibel X:dB Sound Level Meter

By SkyPaw Co. Ltd

  • Category: Utilities
  • Release Date: 2011-11-05
  • Current Version: 8.1.3
  • Adult Rating: 4+
  • File Size: 31.81 MB
  • Developer: SkyPaw Co. Ltd
  • Compatibility: iOS 9.0+
Score: 4.5
From 65,816 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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Camera crashes constantly

Due to the subscription model I uninstalled the app, and fart in the developers general direction while doing so.
By Emile000


Its been of great use to see how noisy jobsores are and take quick action to eliminate noise and ensure adequate hearing protection is used.
By butgereater


By The nfnfntntngntj

Not worth it! Can buy a professional sound meter instead

Free is full of tricky, deceptive ads, that socially engineer you to click install now of junk Apps you’d never want. Paid version at basically $50 a year is totally NOT WORTH IT! $10/ yr would be more like it. I pay for good apps that are ethically engineered - This app has click bait, deceptive adds designed to trick you into accidentally clicking install or purchase junk Apps. No! Just the poor, shady ethics of there free version shows that they cannot be trusted for a business relationship. Why would I pay a business I can’t trust - that tries to deceive me. Free version-riddled with deceptive ads - not worth it. Paid version - way to expensive from a company you can’t trust - not worth it. Uninstalling now! And saving my money for a semi-professional sound meter!
By EV Joy


Really neat, full functioned, very easy to use. I can now document how much noise, exactly, the poor installation of our HVAC system has brought.
By Another Jim Andersen

Doesn't work iPhone 11

It worked once and now the test file is the only one that worked it's doesn't play any other files or sometimes doesn't even save. It says no data but has the sound wave?? I want a refund
By ffvtnjrjhhshh


They steal your money.
By alexalexxxxxxyyyyzzzz


Nice app. Very accurate!
By JSDyno

No free version apparently

Was taken immediately to authorization to start a free trial - no “free” version apparently at all. Uninstalled immediately.
By beley


Not obvious how to cancel the subscription.
By keolight


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