Measure all vibrations and quakes using smartphone!

Hamm Seismograph visualizes vibrations similar to a seismometer.

Acceleration measurement and determination of therelevantfrequency, the acceleration and the amplitude of theoscillationExplanation of the buttons arranged on top of the screenCONTI:Continuous measurement 5 SEC: Fixed measurement duration of 5sec,then STOP automatically STOP: Stop of measurement, the last5seconds are displayed -: In stop mode, move zoom window(1.28sec)to the left, only for PRO version +: In stop mode, movezoom window(1.28sec) to the right, only for PRO version There aresevenfigures below the buttons. Upper figure "Currentaccelerationvalues": The accelerations values are displayed. Thesamplingfrequency of most smartphones is 50 Hz. If the actualsamplingfrequency deviates by ± 1 Hz, then the actual samplingfrequencyappears (flashing). Different times must then becorrectedaccordingly. The numerically displayed measured valuesarecorrected automatically. During a swipe action "from bottom lefttotop right", the APP goes into a diagnostic mode. Then theactualsampling frequency, the standard deviation of thesamplingfrequency and an internal counter appear. Underneathfigure"Accelerations over time": It shows the accelerations curveof thelast 5 seconds. After pressing STOP, a window of 1.28 sec ismarked(vertical black bars). in PRO version: the window can bemoved by±, after a double-tap on the figure it appears twice aslarge,after another double-tip it is resized again. Swipe up, swipedownto change the scaling. Underneath figure "Largest of thethreeacceleration components curve": It shows the accelerationcomponentwith the maximum acceleration change. The zoom windowisrepresented by 1.28 sec. It is particularly suitableforoscillation frequencies from 1 Hz to 15 Hz. The more sinusoidalthetime signal, the more secure are the determined values.Indiagnostic mode, trigger points and sine approximationsarevisible. In PRO version: after a double tip on the figureitappears twice as large, after another double-tip it isresizedagain. Swipe up, swipe down to change the scaling.Underneathfigure "Numerical evaluation from the time signal":Hereevaluations from the time domain are displayed numerically. Inthediagnostic mode, the number of detected vibrations aredisplayed.Sx is their standard deviation. The larger n and smallerSx, thesafer the values determined. The acceleration amplitudealsospecifies a standard deviation. The calculation is done withtheleast square method. Underneath figure "FFT-writing oftheacceleration over time": Here, a plot of the accelerationspectrumover time is shown. Shown are the last 5 seconds. The zoomwindowis marked. In PRO version: after a double tip on the figureitappears twice as large, after another double-tip it isresizedagain. Swipe up, swipe down to change the intensityscale.Underneath figure "FFT spectrum of the zoom window": It showstheFFT spectrum within the zoom window. The black curve istheresulting acceleration. In PRO version: after a double tip onthefigure it appears twice as large, after another double-tip itisresized again. Swipe up, swipe down to change thescaling.Underneath figure "FFT, numeric": It is the numeric outputof theFFT spectrum within the zoom window. The maximum of the FFTisindicated by a cross. Frequency, Amplitude and maximumaccelerationvalues are shown.

Android devices have a accelerometer sensor. It is asensitivesensor that reports the device vibrations. This tool is apowerfulvibration meter tool. It has the following features: -showsvibrations in real time - saves vibration data into SD card(*zipfiles also supported) - calculates the Root Mean Square (RMS)ofthe vibrations - usefull for self made DRONE calibrations-provides configurable sound alarm that may be used to: - detecttheearthquakes when you sleep - detect if somebody opens the doorwhenyou sleep It is recommended to use the battery charger whenitworks for a long time. This application comes with ABSOLUTELYNOWARRANTY.

Vibration accelerometer (measure - store - analyze)

Measure phone's vibration and the earthquake with your phone.

Measure vibrations or earthquakes with your device.

Measure and save environmental noise and vibration with yourdevice.

Accelerometer sensor as Meter, Graph, Spectrum, Music, Light, Info

Sound Meter PRO is professional sound meter for your Android.SoundMeter is also known as sound level meter, decibel meter (dBmeter),noise meter, sound pressure level meter (SPL meter). SoundMeterPRO uses your Android's microphone to measure levels of noiseorsound pressure levels and displays measured data in dB(decibels)with reference to generally known noise (provided byAmericanAcademy of Audiology) or displays the noise data on easy toreadgraph for the last 30 seconds of app use. Microphones inAndroiddevices are made to record human voice, therefore themaximum noiseis limited and very loud sounds cannot be recognized(in most casesabove 100dB). Sound Meter PRO is calibrated to beaccurate in +-2.5dB range of actual noise level and is probably byfar the mostaccurate sound meter on Google play. We have adjustedSound MeterPRO with the use of professional sound meter used bysoundengineers and made required adjustments for many Androiddevices,including the most popular devices on the market today.Levels ofNoise In decibels (dB) according to American Academy ofAudiology(www.audiology.org): 140 dB - Gun shots, fireworks 130 dB-Jackhammers, Ambulance 120 dB - Jet planes taking off 110 dB-Concerts, Car horns 100 dB - Snowmobiles 90 dB - Power tools 80dB- Alarm clocks 70 dB - Traffic, vacuums 60 dB - Normalconversation50 dB - Moderate rainfall 40 dB - Quiet library 30 dB -Whisper 20dB - Leaves rusting 10 dB – Breathing Why would you useSound MeterPRO? Measure the noise your neighbors make, check newcomputers,refrigerators, air conditioning units before your buythem fornoise levels and select the more quiet ones, to have lessnoisepollution in your home. Measure how loud your car, motorcycleis.Adjust the sound system for the party you are making to safelevelsnot to damage peoples hearing. Measure the noise in theapartment,house you are about to buy, it might be too noisy to livein anddemand for extra noise insulation. Measure your love onessnoringlevels and show them the graph after. Possibilities areendless,Sound Meter PRO is a must have app for every Androiddevice.

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