4.5
2022-02-20
Re-compiled for latest iOS. Better handling of various screen sizes and shapes.
4.4
2020-01-15
Optimized for latest iPhone (11) and iOS (13).
Note that natively iPhone 11 does NOT support upside down mode (same for all Apps: Safari,...).
4.3
2017-03-02
Re-compiled with latest iOS
4.2
2016-02-10
Minor update.
iPad users will probably be invited to re-run the 'SET' procedure, when available.
4.1
2016-01-28
Few minor improvements, including a bug correction: in very particular conditions the 'SET' procedure (relative calibration) applied to an external microphone may have failed. No such issue detected with internal microphone. Users with external microphones should re-run this procedure.
4.0
2015-10-28
Major update that improves by the way accuracy in higher range of measurement. A new procedure appears, to align internal gains: the 'SET' procedure. Just go to Mic. tab, select 'SET' when available (depending on device type), and follow instructions. It will generate a beep that will last few seconds thus find a quiet room first. Fortunately this procedure is to be run only once.
From now logSPL can be seen as a derivative of SPLnFFT. Both Apps will share the same core, with this difference: SPLnFFT is a full featured sound level meter targeting advanced users whereas logSPL is designed to be simple to use, for standard usage, yet with the same accuracy.
Note: click on the text to change displayed data and information
3.6
2015-02-26
Updated to support natively latest architectures (arm64). No change expected from user's point of view
3.5
2015-01-23
Major update for recent iPads: new offset applied. Before this modification measurements with internal microphone were over-estimated of 10dB on this type of device. No change for iPhones.
Any issue regarding installation or any other topic ? Contact me by mail: I cannot answer to comments in iTunes.
3.4
2014-09-28
Minor update for compatibility with latest iOS release
3.3
2014-04-18
_ user interface slightly improved thanks to bigger controls
_ now you can read directly the value of current level by tapping the historical view
3.1
2014-02-28
Migration to iOS7
3.0
2013-05-31
Major update with regards to A/C/Z weightings
2.5
2013-05-18
Fine tuning of pre-calibration values
Hysteris increased to switch from LOW to HIGH sensitivities
Improved robustness when using an external microphone
2.4
2012-11-28
Dosemetering feature did not handle correctly the Threshold parameter. It is now corrected.
2.3
2012-11-15
Minor graphical bug removed
2.2
2012-10-30
Smart update: gain of microphone can now be forced to low or high, when measurement mode is available (iPhone and iOS5 or above)
2.1
2012-10-11
Updated with latest iOS. Optimized for iPhone 5
2.0
2012-06-15
Major update:
* added a pause button
* added an histogram
* it can compute L%: L95, L50, ...
* added this feature: dosemeter
1.6
2012-06-06
Optimized for retina displays: iPhone 4/4S, new iPad
1.5
2012-05-27
Some minor cosmetic changes. Reset is simplified
1.4
2012-05-03
A & C weightings curves were modified to be more accurate
1.3
2012-02-14
The upper window can now be scrolled left-right to display results using other scales. When 'dBr' is mentioned, then results are displayed relative to average value (thus average itself is 0 in these views). Currently 4 views are proposed.
Useful range is extended for some devices when used with iOS5.
1.2
2012-01-21
Some cosmetic changes that should improve even more ease-of-use.
One additional feature: weighting of type Z is added on top of existing ones: A and C.
The blue line disappears since it can create confusion.
Optimization of CPU power for an iPhone 3GS.
1.1
2012-01-14
Now Min/Avg/Max levels can be read as text in a new information view