Decibel X - Pro Sound Meter

Contains adsIn-app purchases
3.8
9.08K reviews
1M+
Downloads
Content rating
Everyone
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About this app

"Decibel X" is one of very few sound meter apps on the market that has highly reliable, pre-calibrated measurements and supports frequency weightings: ITU-R 468, A and C. It turns your phone device into a professional sound meter, precisely measures the sound pressure level (SPL) all around you. This extremely useful and beautiful sound meter tool will not only be an essential gadget 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 MAKES "DECIBEL X" SPECIAL:

- Trusted accuracy: the app is carefully tested and calibrated for most devices. The precision is matching with real SPL devices
- Frequency weighting filters: ITU-R 468, A, B, C, Z
- Spectrum analyzer: 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.
- 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
+ Fullscreen mode to give overview the whole history of an record
- Dosimeter: NIOSH, OSHA standards
- InstaDecibel to capture your dB report overlaid on photos and easily shared via popular social networks (Facebook, Instagram, etc.).
- Beautiful, intuitive and carefully crafted UI design

OTHER FEATURES:

- Standard time weightings (Response Time): SLOW (500 milliseconds), FAST (200 milliseconds) and IMPULSE (50 milliseconds)
- Trimming calibration from -50 dB to 50 dB
- Standard measurement range from 20 dBA up to 130 dBA
- Spectrogram
- HISTO graph for plotted history of the recorded values
- WAVE graph with 2 display modes: Rolling & Buffer
- 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
- Pause/Resume at any time

NOTES:

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

If you like it or have suggestions, please support us by rating and giving us comments and feedback.
Updated on
Apr 11, 2024

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
This app may share these data types with third parties
Location, App activity and 2 others
No data collected
Learn more about how developers declare collection
Data is encrypted in transit
Data can’t be deleted

Ratings and reviews

3.8
8.79K reviews
A Google user
November 14, 2018
It's a very handy app, however I think itd be more effective used indoors only. It denotes basic street noise while recording, but if theres a very loud noise unusual for the environment, it will still change the high end decibel level to the one for that isolated incident. Perhaps there's more to it than I was able to get to in my rush & if I go back & Im able to account for the sound that I'm specifically trying to capture (a voice yelling thru a bullhorn e.g.), then I will up my rating to 4 stars. I can't give it 5 stars since it won't export or share the data unless you pay to upgrade it.
24 people found this review helpful
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King Savage
July 31, 2023
My spectrum map is always covered by a weird blue bar when I open the app. I have to swipe and change settings a couple of time to actually see the graph. Otherwise great. I have nothing to compare it against so I can't speak for it's accuracy especially since it's phone dependent, seems good enough. Will update when/if my blue box situation is resolved
23 people found this review helpful
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SkyPaw Co., Ltd
August 3, 2023
Hi King Savage, thank you for your feedback. We are sorry that you have experienced that bug. Could you check the Android version you are using & possibly update it to the latest one? As we don't have your email address, can you please write to us at contact@skypaw.com so that we can help you better?
Derek Basham
February 20, 2023
Good features. Accurate to my ears. Impossible to exit the app. And when you do manage to find your way out of it(either recent or home navigation, back does not work) this app maintains use of your microphone. Only a force stop will make it relinquish use. Ignoring set permissions "Just this once" or "Only in Use" once you exit, it's still listening. And since it has internet access, whatever is heard has to go somewhere. Otherwise this app could (and should) be fully offline. Uninstalled.
45 people found this review helpful
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SkyPaw Co., Ltd
February 20, 2023
Hi Derek Basham, thank you for your feedback. We are sorry that you have experienced that bug. Could you check the Android version you are using & possibly update it to the latest one? As we don't have your email address, can you please write to us at contact@skypaw.com so that we can help you better?

What's new

∿ Fix a an issue on Android 14 where after saving, app will not properly reset
∿ Components upgrade
∿ Various performance improvements and minor bug fixes