RevMeter Pro
$4.99
4.1for iPhone, iPod touch
Age Rating
RevMeter Pro Screenshots
About RevMeter Pro
RevMeter Pro measures the reverberation time of a room.
Burst and interrupted modes are supported. Because the dynamic range of the
iPhone microphone (30dB - 100dB) is too low to get 60dB dynamic RevMeter Pro supports only the RT30 and RT20 method.
RevMeter Pro also lets you send the measured results by eMail for later analysis. In addition screenshots
may be saved to the iPhoto album.
Definition of Reverberation Time:
The Reverberation Time RT60 is defined as the time required for reflections of a
direct sound to decay by 60 dB below the level of the direct sound. As it is usually very
difficult to achieve a dynamic range of 60dB two more methods have been established. They
are called RT30 and RT20. The measured time is the multiplied by 2, respectively 3 to
compute the RT60 time.
Measuring the reverberation time:
Historically reverberation time could only be measured using a level recorder
(a plotting device which graphs the noise level against time on a ribbon of moving paper).
A loud noise is produced, and as the sound dies away the trace on the level recorder will show a
distinct slope. Analysis of this slope reveals the measured reverberation time. Modern digital
sound level meters can carry out this analysis automatically.
Two basic methods exist for creating a sufficiently loud noise (which must have a defined cut off point).
Impulsive noise sources such as a blank pistol shot, or balloon burst may be used to measure the
impulse response of a room. Alternatively, a random noise signal such as pink noise or
white noise may be generated through a loudspeaker, and then turned off.
This is known as the interrupted method, and the measured result is known as the interrupted response.
Disclaimer:
Even though the RevMeter Pro Software has been calibrated using professional grade equipment, do no use RevMeter Pro
to carry out professional measurements. The author can not be held liable for any damage which might arise by using RevMeter Pro.
Burst and interrupted modes are supported. Because the dynamic range of the
iPhone microphone (30dB - 100dB) is too low to get 60dB dynamic RevMeter Pro supports only the RT30 and RT20 method.
RevMeter Pro also lets you send the measured results by eMail for later analysis. In addition screenshots
may be saved to the iPhoto album.
Definition of Reverberation Time:
The Reverberation Time RT60 is defined as the time required for reflections of a
direct sound to decay by 60 dB below the level of the direct sound. As it is usually very
difficult to achieve a dynamic range of 60dB two more methods have been established. They
are called RT30 and RT20. The measured time is the multiplied by 2, respectively 3 to
compute the RT60 time.
Measuring the reverberation time:
Historically reverberation time could only be measured using a level recorder
(a plotting device which graphs the noise level against time on a ribbon of moving paper).
A loud noise is produced, and as the sound dies away the trace on the level recorder will show a
distinct slope. Analysis of this slope reveals the measured reverberation time. Modern digital
sound level meters can carry out this analysis automatically.
Two basic methods exist for creating a sufficiently loud noise (which must have a defined cut off point).
Impulsive noise sources such as a blank pistol shot, or balloon burst may be used to measure the
impulse response of a room. Alternatively, a random noise signal such as pink noise or
white noise may be generated through a loudspeaker, and then turned off.
This is known as the interrupted method, and the measured result is known as the interrupted response.
Disclaimer:
Even though the RevMeter Pro Software has been calibrated using professional grade equipment, do no use RevMeter Pro
to carry out professional measurements. The author can not be held liable for any damage which might arise by using RevMeter Pro.
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What's New in the Latest Version 4.1
Last updated on Oct 6, 2022
Old Versions
Fixed occasional crashes when saving images or sending them by eMail
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Version History
4.1
Oct 6, 2022
Fixed occasional crashes when saving images or sending them by eMail
4.0
Aug 27, 2019
Support for wide screen iPhones with FaceID
3.9
Mar 4, 2018
Fixed crash, when accessing photo library
3.8
Oct 10, 2016
Calibration for iPhone 7 and 7 Plus. Also enabled use of measurement microphone i436 through the lightning headphone adapter.
3.7
Aug 9, 2016
Compatibility with iPhone SE
3.6
Oct 7, 2014
- calibration for iOS8 on iPod 5, iPhone 4S, iPhone 5, iPhone 5S, iPhone 6 & 6+
- fixed grafiks problem on iOS8
- fixed grafiks problem on iOS8
3.5
Aug 20, 2014
Calibration for iOS 8
3.4
Jul 16, 2014
small bugfixes
3.3
Jul 7, 2014
fixed CSV export bug which misaligned columns and column headers
3.2
Jun 20, 2014
- greatly improved analysis algorithm
- add column for measurement time to export file
- add column for measurement time to export file
3.1
Apr 5, 2014
- Supports the i436 measurement microphone
3.0
Jan 10, 2014
- new, highly improved algorithm
- 10ms resolution
- spectrogram view for frequencies involved in reverb
- 10ms resolution
- spectrogram view for frequencies involved in reverb
2.1
Jun 8, 2013
Improved precision on iPod 4
Support for iPod 5
Support for iPod 5
2.0
Oct 2, 2012
- supports iPhone 5 wide screen
- added calibration for iPhone 5
- added calibration for iPhone 5
1.7
Sep 18, 2012
- tested and optimized for iOS6
1.6
Mar 30, 2012
support for iPhone 4 on Verizon network
1.5
Dec 7, 2011
- fixed noise mode on iOS 5
- measures in dB(A) on iPhone 4 and 4S with iOS 5
- measures in dB(A) on iPhone 4 and 4S with iOS 5
1.4
Aug 24, 2011
- Better calibration for iPod Touch 4G
- mic indicator on iPhone 4 moved to bottom
- mic indicator on iPhone 4 moved to bottom
1.3
Aug 1, 2011
now works with microphone equipped iPod Touch
1.2
Nov 23, 2010
- Fixed a formatting bug in the eMail
- Supports iOS 4.2
- Supports iOS 4.2
1.1
Sep 27, 2010
works with iOS 4.1 and iPhone 4
1.0
Feb 27, 2010
RevMeter Pro FAQ
RevMeter Pro is available in regions other than the following restricted countries:
China
RevMeter Pro supports English, German
Click here to learn how to download RevMeter Pro in restricted country or region.
Check the following list to see the minimum requirements of RevMeter Pro.
iPhone
Requires iOS 11.0 or later.
iPod touch
Requires iOS 11.0 or later.