Polarity Checker

Polarity Checker

By DWA ICT Solutions

Polarity CheckerPolarity CheckerPolarity CheckerPolarity Checker

For a good working Sound System it's essential that every one loudspeakers are wired correctly.

With this app you presumably can flip your android gadget into a polarity popper and check the polarity of a speaker, whether it first moves forwards or backwards (often mistakenly named section, which can be time and frequency related).

A loudspeaker should have the same polarity because it's good friend on the other side when measured on the identical position/distance. This also counts for multiple speakers which must be doing the same (a cluster of multiple subwoofers for instance).

Important notes:

- Red is NOT bad!! A lot of filter-designs that drive loudspeakers have out of polarity parts (so for instance the high frequency speaker CAN be opposite polarity to the low frequency speaker).

- Try 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 utmost soundpressure your gadget is able to handling without distorting (clipping).

- Using a different pulse sign CAN give opposite readings, because of loudspeaker filter designs. Use the same pulse when comparing!

Polarity Checker could be useful for testing virtually all sound sources. Like large scale concert PA techniques, house theater systems, studio screens, car audio en even headphones..

Usage:

For taking part in the heartbeat signal you could have 3 options:

- Use a wire to connect your phone/tablet to the Sound System.

- Use 2 phones/tablets (one wired for pulse technology and one with out wires for measuring).

- Copy the pulse recordsdata (which may be present in sd-card/PolarityChecker) to a playback medium (cd/iPod) that is ready to repeat single tracks.

- When the polarity-reverse button Ø is pressed (red), the heartbeat generator performs a unfavorable pulse. So the measurement should give reverse readings! (equal to enjoying an INVERTED_pulseXXXX.mp3 file)

Measuring:

- Avoid CLIPPING the microphone, this might corrupt the measurement.

- Adjust the brink, so the checker doesn't get triggered by background noise.

- Try to measure one speaker at a time. If potential mute all other sound sources.

When measuring passive filtered speaker cupboards (for instance when you've got one amplifier driving your high and low speaker on the identical time), it may be useful to pick a frequency dependent pulse to isolate the speaker you need to measure.

If you want this app, please remark and fee. If you've got received any questions, bugs or feature requests, please visit the facebook page: http://www.fb.com/PolarityChecker

PERMISSIONS USED:

- RECORD_AUDIO: To use the mic enter of the device

- STORAGE: Needed to copy the pulse files to the sdcard

- FULL INTERNET ACCESS: Needed for Ads (not used when donation key's purchased)

- VIEW NETWORK STATE: Needed for Ads (not used when donation key is purchased)

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