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Description

This application brings the functionalities of a Sound LevelMeter(SLM) and a Real Time Spectrum Analyzer (RTA) to your phone.SPL(dB) of the microphone (internal or external) signal. Suitableforacoustic measurements: - SLM: traffic or ambient noiseanalysis(TNI, dBA/dBB/dBC, Leq) - RTA: audio equipment frequencyresponseanalysis (spectrum, octaves, peaks, RMS) This app has muchmorefeatures (+) than the basic edition (no ads). >>SLMmainfeatures: • measurements in SPL • 3 measuring modes(Dynamic,Average, Cumulative) + 3 weighting filter curves: dBA,dBB, dBCaccording to DIN-IEC 651 + fast & easy calibration page• soundlevel versus time chart • current dB value, avg (Leq), minand maxdisplay • Leq (wideband, RMS of the observation period) •audiothreshold trigger + sound level distribution chart +accumulatedsound level chart + current value, Leq, L90, L50 and L10valuesdisplay + TNI (Traffic Noise index) display + exportingofmeasures, chart data (CSV) and screenshot (PNG) • testedwithsamsung galaxy • sharing of text values and screen bmp>>RTAmain features: - measurements in SPL + 5 spectrummeasuring modes(dynamic, average, peak, avg/exp smoothing) - soundlevel versuslinear frequency chart + sound level versus logarithmicfrequencychart (HzLog) + 1/1 Octave Bands chart - 1/3 Octave Bandschart +Microphone Equalizer (Internal or External) in 1/1 Octavebands +calibration in 1/1 Octave bands + 2 spectrum views (Panel&Chart, Landscape Chart) - tap or swipe to select theproperfrequency step - long press to zoom - 4 values versusselectedfrequency component displayed (current, Leq, max, min) +Leq(Octave, RMS of the observation period) + Leq (selectedfrequency,RMS of the observation period) - 20hz/22kHz band, 44100Hz samplingrate + adjustable FFT size (up to 8192, about 5 Hzaccuracy) ,adjustable FPS (up to 20) + exporting of measures/chartdata (CSV)and screenshot (PNG) >>Data collection Theapplication relieson the mobile microphone signal. To achieve thebest resultsconsider the following: 1) Easy Calibration (only thefirst time):Some mobiles are automatically calibrated in the firstinstallationphase. For details see the calibration section of theuser manual.2) keep your fingers away from the mobile microphone 3)silenceyour phone to avoid any ring tones, vibrations and othersounds 4)orient the phone microphone toward the noise sourcekeeping thecorrect distance 5) click on the functionbuttons>>Troubleshooting 1) Wrong SPL/RTA calibration: Seethecalibration section 2) No signals detected below 20dB orover100dB: most smart phone microphones do not work under 20 dB orover100 dB 3) Signal attenuation near band limits: the mobile micmayattenuate frequencies <100 Hz and >15000 Hz Read theembeddedUser Guide: for any info or troubleshooting you can contactus [email protected].