logSPL vs SASER

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 !

1. SASER software capable of receiving the incoming signal for VLF stations by retranslating it with internal synthesizer engine. The stronger the signal of VLF radio station, the more sound amplification it produces. The scanner of SASER software capable of switching VLF radio stations according to a set of rules for predefined monitoring. 2. Derived hyperbolic function uses up to 1536 points of distributed network service, which lowers the potential risk of DDoS by 1536 times. SASER software capable of suppressing radio stations signal with digital processors resolution of up to 192-bit. The fundamental approach of SASER software is to organize unicasting translation using digital ether from existing radio stations and if no signal is present to switch to internal digital ether generator. 3. SASER software reproduces VLF network of radio stations without physical limitations of wave propagation. The algorithm of SASER software modem works not only on a spectral level, but also on the real-time event generator level by merging three levels of operation at once.  4. You can use the signals of VLF radio stations for unicast translation. SASER software can translate incoming signals into the internal network of 1536 points. 5. You can view the system of SASER software as a solution for transport networks used in VLF radio stations. 6. The sequencer of SASER software uses approximation operations in a spherical space for playback of resulting radio signals, formed in a presence of signal constellations.