Polarity Checker is a music & audio app developed by DWA ICT Solutions.
Download Statistics
Polarity Checker has been downloaded 270 thousand times. In the last 30 days, the app was downloaded 64 times.
User Ratings
Polarity Checker is rated 3.98 out of 5 stars. The rating is based on 1.2 thousand ratings.
App Information
Polarity Checker is FREE to download. The APK download size is 1.73 MB. The latest version available is 1.4. The last update was on April 6, 2013.
Technical Requirements
Polarity Checker requires Android 1.5+ or higher. The app has a content rating of Everyone. The app has been available on Google Play October 2012.
Description
For a good working Sound System it is essential that all loudspeakers are wired correctly.
With this app you can turn your android 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 should have the same polarity as it's "friend on the other side" when measured at the same position/distance. This also counts for multiple speakers which should 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 components (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 maximum soundpressure your device is capable of handling without distorting (clipping). - Using a different 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 large scale concert PA systems, home theater systems, studio monitors, car 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 should give opposite readings! (equal to playing an INVERTED_pulseXXXX.mp3 file)
Measuring: - Avoid CLIPPING the microphone, this could corrupt the measurement. - Adjust the threshold, so the checker doesn't get triggered by background noise. - Try to measure one speaker at a time. If possible mute all other 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 select a frequency dependent pulse to isolate the speaker you want to measure.
If you like this app, please comment and rate. If you've got any questions, bugs or feature requests, please visit the facebook page: http://www.facebook.com/PolarityChecker
PERMISSIONS USED: - RECORD_AUDIO: To use the mic input of the device - STORAGE: Needed to copy the pulse files to the sdcard - FULL INTERNET ACCESS: Needed for Ads (not used when donation key is purchased) - VIEW NETWORK STATE: Needed for Ads (not used when donation key is purchased)
Get a detailed PDF report for Polarity Checker with download trends, rating history,
and key performance statistics — useful for competitive research or tracking your own app.
Learn more
Are you the developer of this app? Join us for free to see more information about your app and learn how we can help you promote and earn money with your app.
Nothing fancy but going by the green good, red bad method works well. I had replaced the speakers in my car and couldn't get it to sound right. I was fairly confident that it was wired right but no changes to the head unit eq helped. After installing this it took about 2 minutes to diagnose polarity problem because of non-matching adaptors, and all fixed and checked within the hour.
★★★★★Ivan Porcalla· Feb 22, 2019
Works well. Just have to adjust the threshold and do 5 samples per speaker. Used it in my car speakers. I just found out that my right front newly-installed speakers were out of phase. Just copied the audio test files in a thumb drive, played the tracks repeatedly and got a pretty accurate reading. Just park somewhere quiet.
★☆☆☆☆Swerving Lemon· Aug 19, 2023
Certainly doesn't produce data you can trust. In a quiet room, the phone detects its OWN speaker as being anaphase. I could believe that, but it only detects itself as anaphase about 70% of the time. I'm not switching the polarity, so what gives here? Timing issue?
★☆☆☆☆R zinski· Oct 8, 2021
I really had high hopes for this app to resolve some issues with multi amped 3 way speakers. I found no way to use the app, no sound was produced, could not get the app to even respond to any taps. Another useless audio app, I have yet to find an audio apps that can produce any useful info or perform any real tests that can be used to make adjustments to correct any issues. Most can't use an external mic and produce blue tooth sounds to do any testing?? This is the only way it will work!
★☆☆☆☆nazir kader· Aug 23, 2020
Not reliable, sometimes it shows the polarity is right, sometimes it doesn't, do a battery test, the best way I would recommend
Google Play Rankings for Polarity Checker
This app is not ranked
Technologies used by Polarity Checker
Polarity Checker is requesting 5 permissions and is using 3 libraries.
Show details
Each subscription will automatically renew 3 days before the expiration date for
the same time period. Subscriptions can be cancelled at any time before the renewal.
