Decibel Ultra app for iPhone and iPad

4.8 ( 7248 ratings )

Utilities Photo & Video
Developer: Patrick Schaefer

Free

Current version: 3.5, last update: 6 years ago
First release : 18 Dec 2010
App size: 17.51 Mb

• • • 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.

Pros and cons of Decibel Ultra app for iPhone and iPad

Decibel Ultra app good for

I used this app to analyze noise exposure level in an apartment before and after changing the windows. This was very helpful and accurate. Thanks

I can use it well without any trouble. Turn off lte of this app to prevent it from showing adds

Just the item I needed. Cant think what else anyone would need.

Some of the settings sliders are a little small for fat fingers but otherwise has great sensitivity an functionality.

Woot!!!!!! Yes…..Thanks Patrick for this awesome update. Sweet!!!!

Seems to be quite accurate, and the a, b, c weighing scales are consistent and correct when measuring pure sine wave tones at various frequencies. The ads are incredibly annoying. Can we get a paid, ad-free version?

Some bad moments

Appli prometteuse. Mais je mettrai plus détoiles lorsque laide sera correctement traduite. Cest ridiculement incompréhensible ! Autant le laisser en anglais dans ce cas ! Nice app. But I will add some stars when the "Help" menu will be correctly translated in French. It is ridiculously non-understandable. It would have been better to leave it in English !

Since iOS7, this app became useless cause decibels value is not accurate anymore (it doesnt even move now)

Was a good app until iOS7 came out. Crashes everytime now... Hoping for update soon

That would be okay, but no response from developer when I contacted them about this. No update and it has been weeks. Not okay.

The description in Russian AppStore is worse than nothing, throw away your translator, please! The interface seems good for the first glance but have you ever tried to set any specific offset value? Buttons are too small and non-evident too.

iOs 6.1 iphone 4 any menu and options I try to open closes itself after half a second

Write review

Usually Decibel Ultra iOS app used & searched for

ultra app, decibel, decibel meter, decibel meter® free, db meter, ultra, ultra sound, db meter free, decibell, decibels, decibel meter pro, decibel meter hd free, ultra music, decibel reader, decibel sound meter pro, decibel ultra, decibel meter - sound level meter, decibel ultra pro, decibel meter®, decibel meter +, decibel meter - sound meter, decibel+, decibel®, decibel pro, decibel meter hd, and other. So, download free Decibel Ultra .ipa to run this nice iOS application on iPhone and iPad.