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For Android: 1.5 and up	Guide: Polarity Checker cheats tutorial
When updated: 2021-07-10	Star Rating: 4.173077
Name: Polarity Checker hack for android	Extension: Apk
Author: DWA ICT Solutions	File Name: com.dwa_ict.polaritychecker
Current Version: 1.4	User Rating: Everyone
Downloads: 100000-185358	Version: mod, apk, unlock
System: Android	Type: Education

 

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About the application:

For a awesome working Sound System it is essential that all loudspeakers are wired correctly. With this apk you can turn your android device device into a "polarity popper" and check the "polarity" of a speaker, whether it first moves forwards or backwards (often mistakenly named "phase", which is also time and frequency related). A loudspeaker could have the same polarity as it's "mate on the another side" when measured at the same position/distance. This also counts for multiple speakers which could be doing the same (a cluster of multiple subwoofers for instance). Important notes: - Red is NOT awful!! A lot of filter-designs that drive loudspeakers have out of polarity components (so for instance the high frequency speaker CAN be opposite polarity to the low frequency speaker). - Test to measure as close to the speaker as possible (and away from bass-ports). - dBFS means "Decibels relative to full scale". So 0dBFS is the maximum soundpressure your device is capable of handling without distorting (clipping). - Using a various pulse signal CAN give opposite readings, due to loudspeaker filter designs. Use the same pulse when comparing! Polarity Checker can be useful for testing almost all sound sources. Like really big scale concert PA systems, home theater systems, studio monitors, vehicle audio en even headphones.. Usage: For playing the pulse signal you have 3 options: - Use a wire to connect your phone/tablet to the Sound System. - Use 2 phones/tablets (one wired for pulse generation and one without wires for measuring). - Copy the pulse files (which can be found in sd-card/PolarityChecker) to a playback medium (cd/iPod) that is able to repeat single tracks. - When the polarity-reverse button "Ø" is pressed (red), the pulse generator plays a negative pulse. So the measurement could give opposite readings! (equal to playing an INVERTED_pulseXXXX.mp3 file) Measuring: - Avoid CLIPPING the microphone, this should corrupt the measurement. - Adjust the threshold, so the checker doesn't receive triggered by background noise. - Test to measure one speaker at a time. If possible mute all another sound sources. When measuring "passive filtered" speaker cabinets (for instance when you've got one amplifier driving your low and high speaker at the same time), it can be useful to choose a frequency dependent pulse to isolate the speaker you wish to measure. If you like this apk, please comment and rate. If you've got any questions, bugs or feature requests, please visit the fb page: http://www.facebook.com/PolarityChecker PERMISSIONS USED: - RECORD_AUDIO: To use the mic input of the device - STORAGE: Required to copy the pulse files to the sdcard - FULL INTERNET ACCESS: Required for Advertisements (not used when donation key is purchased) - VIEW NETWORK STATE: Required for Advertisements (not used when donation key is purchased)

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