logSPL vs Panel Legend 2

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 !

Panel Legend 2 is a fast, easy way to create panel legends for any size of job. Put your pencil down and start making professional legends today. - Universal app allows use on both iPad, Mac, and iPhone/iPod with single purchase. - iCloud support saves your data across multiple devices. - Create legends of any size with any number of circuits. - Print your legends right from the app. - Panel legends save based on job/project to easily locate them later. - Export your legends as pdf. - Include colour coded circuit numbers to easily keep track of phases. - Gang circuit description for multipole breakers. - Enter panel legend size in inches or centimeters. - Support for AB slim line panels. - App includes a full featured construction style calculator, torque calculator and conversion app.