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 the leading noise meter app on the market, which has highly reliable, pre-calibrated measurements and supports dBA, dBC. Our success lies at the intersection of expertise in sound communication, listening to our dear users, and our vision to build a great product. Our app turns your iOS device into a professional sound level meter, precisely measures the sound pressure level (SPL) all around you. While this pro tool mainly aids audio experts or workers prone to noise pollution, it can also add more fun and protect your hearing. Have you ever wondered how quiet your surroundings are or how loud is a rock concert or football match? "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
- 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
- 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.
* Choose from different subscription options. Our standard subscription options are:
* 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.
* EULA: http://www.skypaw.com/decibelx/terms.html
Thanks for using Decibel X! Here's what's new for the version 9.4.0:
∿ Now support recording in background
∿ Histograph supports Line and Dot drawing modes
∿ Improve Spectrogram rendering
∿ Fix an issue where audio file might not be saved when auto saving is ON
∿ Upgrade components
∿ Various 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
Really Nice; How About This.
This is a great tool for audio enthusiast and semi pro apps.. very useful. How about this developer... what if you had a filter for the audio enthusiast that instead of showing air plane, riveter, streets noise, etc, it showed whispering, quiet conversation, normal conversation, public speaking, quiet church music, typical church music, loud church music, Jazz, Orchestra, Country Music Concert, Rap Music, Rock Concert. Each of these have associated typical levels such as...
60~67 Quiet Conversation
67~70 Normal Conversation
70~72 Public Speaking
82~92 Quiet Church Music
92~95 Typical Church Music
95~102 Loud Church Music
115~125 Rock Concert
Etc... you get the idea
These are all subject to I individual styles and preferences but the ideas is to get close, some type of base line for people who really have no idea what they’re doing but they knobs anyway (and you know who you are). This is very common in church music and small clubs where speakers mics are either so soft people lose interest or so loud it’s annoying. Or when the band is so soft it ruins the mood or so loud it’s dangerous to your ears. Many churches have no idea what is appropriate sound levels or what is borderline dangerous. I think this might be very helpful.
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 email@example.com. Thank you for taking your precious time and reviewing our app.
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.
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Usage Data
Privacy practices may vary, for example, based on the features you use or your age. Learn More
- SkyPaw Co. Ltd
- 46.2 MB
- Requires iOS 10.0 or later.
- Requires iPadOS 10.0 or later.
- iPod touch
- Requires iOS 10.0 or later.
- Requires macOS 11.0 or later and a Mac with Apple M1 chip.
English, Dutch, French, German, Italian, Japanese, Korean, Portuguese, Simplified Chinese, Spanish, Traditional Chinese, Vietnamese
- Age Rating
- © 2021 SkyPaw
- In-App Purchases
- Monthly Membership $4.99
- Weekly Membership $1.99
- Annual Membership $29.99
With Family Sharing set up, up to six family members can use this app.