Decibel X:dB Sound Level Meter 4+

Frequency Spectrum Analyzer

SkyPaw Co. Ltd

Designed for iPad

    • Free
    • Offers In-App Purchases

Description

This app turns your iOS device into a professional sound level meter, detects harmful environmental noises, and helps protect your hearing and health.

"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

What’s New

Version 9.6.0

Thanks for using Decibel X! Here's what's new for the version 9.6.0:
∿ Add a whole new powerful calibration screen which supports: Linear, per Octave calibrating and load/save profile.
∿ Support Live Activity
∿ Support Dynamic Island
∿ Support Lock Screen widget
∿ Fix a camera issue that limits recording duration for subscribers
∿ Fix an issue where need to double swipe to exit the app
∿ Vastly improve UI and performance
∿ Upgrade library components
∿ Various other minor improvements & fixes

What to expect in upcoming versions:
∿ Set notification alarm when exceeded a preset threshold
∿ Support external or bluetooth mics
∿ Hearing test

Ratings and Reviews

4.6 out of 5
102.4K Ratings

102.4K Ratings

9235S ,

Great app!!

The free version is likely the best app of its kind, and highly recommended. The only strike against it is that the premium version is subscription based, and a fairly expensive one at $4.99 per month. I suspect that for most casual users, this is far too expensive…I certainly wouldn’t pay that. I can understand subscriptions for something like a newspaper or periodical magazine, where content is changing, but not for something that provides an essentially fixed functionality. This kind of app is particularly suitable to one time purchase of premium functionality.

SUGGESTION TO DEVELOPERS
Create a reasonably priced onetime purchase option If you keep a subscription, reduce the cost considerably. You may be surprised how many more paid users you’d have, if you do this.

Developer Response ,

Thank you for your kind words. We are glad that you like our App.
If you want to find the one-time paid version.
You can find "Decibel X PRO: dBA Noise Meter" on AppStore or via this link https://apps.apple.com/us/app/decibel-x-pro-dba-noise-meter/id1257651611

4ndr0 ,

My usage of the app

Provided the app is calibrated properly when you set it up, it’s pretty accurate in isolated areas like calibrating a turn table or checking a receiver for accuracy. However, a bunch of unrelated sounds events taking place at the same time throws the app off. Instead of giving you an average for the space you’re in, it just fluctuates based on individual sounds it picks up. For example, I value my hearing because I’m a musician. When I go to loud concerts I wear earplugs.

At a recent Korn concert I wanted to decide if I was far enough away that I wouldn’t damage my hearing or leave the venue with ringing ears. I tried the app, but I got numbers from people talking behind me, the band, clapping, so I wasn’t able to get an accurate reading. The meter jumped from 50db to 80db at a Korn concert where I was about 100 feet from the stage. While it wasn’t hitting over 100db or heaven forbid 120db, I chose to wear earplugs and I was the only one in my group to not leave with ringing ears.

In summary, the app is really great for isolated spaces, but it has trouble handling multiple sounds from multiple sources and giving you a stable number to work with. I don’t recommend it for harm reduction at a concert event, but I do recommend it for checking your speaker levels, calibrating your receiver, or anything audio related that is in a quiet testing area.

Developer Response ,

Hi 👋 ! Thank you for your detailed feedback with both pros & cons of your experience with Decibel X. For you case, we consider that the issue possibly was due to the far distance to our app, and thus led to the incorrect measurement. We love to know more about your problem, could you share with us via the email contact@skypaw.com. Thank you for taking your precious time and reviewing our app.

treynolds57 ,

Very Good, With One Quibble...

I’ve used a couple sound meter apps over the last few years along with a commercial quality sound level meter. I would put this up there with the best of what I’ve used. This review is for the purchased, “pro” version of the software. That I can pay $4.99 and use the processing capabilities of my iPhone in leu of spending $150+ on a professional, stand-alone meter blows my mind.

The level of detail shown in the various portions of the screen offer a broad range of information to the user. You get both numerical and graph output as well as dial analog output of minimum and maximum readings, duration, etc.

One quibble is that when I pause the meter and reset it, it asks if I really want to, which is okay, but immediately restarts the sound reading, even if I don’t want it to. Also, I’d like for a reset to take the meter back to “0”. It restarts at the prior average. I would like to see these twin issues corrected, and I’d then give the app 5 stars.

App Privacy

The developer, SkyPaw Co. Ltd, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Not Linked to You

The following data may be collected but it is not linked to your identity:

  • Usage Data
  • Diagnostics

Privacy practices may vary, for example, based on the features you use or your age. Learn More

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