Decibel Ultra 3.5
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Free Version
Publisher Description
Would you like to know how loud the TV, music or the environment is?
Or your neighbour is too loud? With Decibel Ultra you know it precisely!
• • • Decibel Ultra • • •
- Would you like to know how loud the TV, music or the environment is?
- Or your neighbour is too loud? With Decibel Ultra you know it exactly!
- Decibel Ultra measures the volume and helps you figure out how big the noise level compared to reference values.
- Calibrate with Decibel Ultra all your surround speakers to the same level.
Decibel Ultra measure the sound pressure level (SPL) in dB professional frequency weightings: A, B, C, D ,Z (flat) and time weightings: Fast, Slow, Impulse.
- Perfect to tune guitars.
- Send the results quickly via email.
- interested how loud you are?
- Ultra-precise measurement of frequencies, a sine of 1000.0 Hz appears really as 1000.0 Hz!
- Calibrated to the internal microphone, equipment enclosed headphones, MicW microphone or with line-in. Decibel Ultra is calibrated to standard 94dB at 0776 Vrms / 1000 Hz.
Decibel Ultra was calibrated with a Class 1 Sound Level Meter and calibrator! From device to device, it may still be fluctuations around a few dB (2-3 dB). The app set the device into a special, best possible measurement mode. The automatic gain control (AGC) will turn off to get clean measurement without distort signals. On some older devices, the AGC can not turned off by software, it will then automatically corrected in the calculation.
Depending on the unit generation, it varies how sensitive is the device. For example the current iOS devices e.g. iPhone 6 (plus) the internal microphone of an iOS device can not perform any measurement below 30 dB. Measurements below 40 dB with an external microphone or via the headphone jack supplied line output, are not possible with this current devices. The headset that came with the iOS device, cannot measure below about 44 dB. This is a limitation of the current device. But hey, 30 dB is already really sensitive!
Highly recommended is the MicW i436. It has a very linear frequency response and dynamic, ideal for precise professional measurements.
Continuous noise can be a potential hazard to your health!
I would like to thank the company MicW Audio and Synthax GmbH for their kind support.
Free version. The ad-free version is called "Decibel Ultra pro" here in the iTunes Store.
Dec 10, 2017 Version 3.5
This app has been updated by Apple to display the Apple Watch app icon.
- bug fixes
- calibration data for iPhone 8 and iPhone X
- support for iOS 8 - iOS 11.x
About Decibel Ultra
Decibel Ultra is a free app for iOS published in the System Maintenance list of apps, part of System Utilities.
The company that develops Decibel Ultra is Patrick Schaefer. The latest version released by its developer is 3.5.
To install Decibel Ultra on your iOS device, just click the green Continue To App button above to start the installation process. The app is listed on our website since 2017-12-10 and was downloaded 16 times. We have already checked if the download link is safe, however for your own protection we recommend that you scan the downloaded app with your antivirus. Your antivirus may detect the Decibel Ultra as malware if the download link is broken.
How to install Decibel Ultra on your iOS device:
- Click on the Continue To App button on our website. This will redirect you to the App Store.
- Once the Decibel Ultra is shown in the iTunes listing of your iOS device, you can start its download and installation. Tap on the GET button to the right of the app to start downloading it.
- If you are not logged-in the iOS appstore app, you'll be prompted for your your Apple ID and/or password.
- After Decibel Ultra is downloaded, you'll see an INSTALL button to the right. Tap on it to start the actual installation of the iOS app.
- Once installation is finished you can tap on the OPEN button to start it. Its icon will also be added to your device home screen.
