logSPL 4+

Noise meter

Fabien Lefebvre

    • ฿79.00

Screenshots

Description

Serious audio measurement since 2010

This App is a full featured sound level meter, designed by a signal processing expert. It is iPhone/iPod/iPad compatible and adapts itself to the actual screen resolutions ("HD", "retina").

It consists in two parts: half top for basic features, half bottom for advanced ones (L95, %D, ...).

Half top was thus designed to be extremely easy to use. Only two settings are requested:
* select 'fast' or 'slow' update rate, which corresponds to 2 different integration periods
* select the type of weighting: A or C or Z (Z meaning roughly: no filtering)
These settings are saved when exiting the App.

Some tips for weighting:
* select A to evaluate the feeling of a person against a noise
* select Z to balance an audio system

Supports upside-down orientation.

The min and max values are monitored and displayed in green in the upper view. An average value (Leq, LAeq, ...) is computed on top of this: the green triangle. Take care that this latter corresponds to the logarithm of the average power and not to the average of logarithm values, which is completely different. Integration time for this average value is: all time since start-up of the App or last reset.
To reset these extreme and average values, touch the text named RESET.

Bottom view is used to display an historical curve. A grid is visible, with lines every 10dB vertical and 10s horizontal.

Half bottom now:
* a real-time histogram is displayed on left side
* it can compute L%: L95, L50, ...
* it can make some dosemetering: for this you need to set threshold, criterion and exchange values. This is for advanced users due to the complexity of underlying concepts

As for all sound-meter (at any price, hardware or software), you should calibrate it against a reference in order to achieve best accuracy. For this go to Mic. tab to add or remove a fixed offset to the measured values.

Any question ? Click on the Facebook icon !

What’s New

Version 4.6

Re-compiled for latest iOS. Better handling of various screen sizes and shapes.

App Privacy

The developer, Fabien Lefebvre, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Not Collected

The developer does not collect any data from this app.

Privacy practices may vary based on, for example, the features you use or your age. Learn More

Supports

  • Family Sharing

    Up to six family members can use this app with Family Sharing enabled.

More By This Developer

SPLnFFT Noise Meter
Utilities
RTSPmyCam
Utilities
Speaker Meter
Utilities
Diapason Audio Generator
Utilities
SPLnWATCH (SPLnFFT extension)
Utilities

You Might Also Like

Home Theater SPL
Utilities
Can you hear me?
Utilities
Sound Lissajous Meter
Utilities
lossless field recorder
Utilities
RPN Anywhere
Utilities
CNVRT: SI Unit Conversion Tool
Utilities