This app offers a cheap and easy to use method to help detect fake bullion coins, by examining their resonance frequencies.
The resonance frequencies of an object are determined by the objects shape and material. If the shape and weight of a silver coin is correct, but the material is not actually silver, then a resonance test could detect this.
This is also known as a "ring test" or "ping test".
Unlike the manual "ring test", this app does not require that the user knows exactly how each coin should sound. The app will also detect resonance frequencies above the range of human hearing.
This youtube video shows how to use this app:
http://www.youtube.com/watch?v=5pZnqp3bl3A
This free version supports three types of coins. Buy the full version to get support for many more coins.
How to use this app:
1. for best results you should perform this test in a reasonably silent room. Some electronic devices may produce high-pitch noises which could interfere with the test.
2. Select the type of bullion coin to test from the drop-down list. Currently only three types of coins are supported.
3. Press the microphone button to start the test.
4. Blue lines indicate the expected resonance frequencies of the selected coin.
5. Balance the coin on your finger, near the microphone of your smartphone. Tap the coin using your fingernail, or use some hard object. Do NOT use a second coin to tap the first one, since the sound from the second coin may affect the results. The sound level required depends on the sensitivity of the microphone in your Android device. For most devices is it sufficient to gently tap the coin with your fingernail.
6a. If the sound matches the expected resonance frequencies of the selected coin, you will see a green check-mark.
6b. If there is too much noise, or if the sound does not match the expected frequencies, then you will se a red cross.
6c. Some Android devices have microphones which are unable to record high frequencies above ~10kHz. If the app detects two out of three expected frequencies, it will indicate this with the fraction "2/3", and report that device limitations might be the reason why the last frequency was not detected.
7. Some practice may be needed to produce a clean enough sound from the coin. The app is sound-activated, you can tap the coin again to do another test.
Needed permissions:
Record audio - To record the sound of the coin.
Storage - Necessary to enable "sharing" of test results.
Disclaimer:
There are no guarantees whatsoever regarding the function and accuracy of this app.
There are many factors which could cause this app to report false positive or false negative results.
This app should only be used to complement other testing methods, not replace them.
Forum thread for discussions and information about this app:
http://forums.silverstackers.com/topic-38955-android-app-uses-resonance-test-to-detect-fake-silver-coins.html
Bullion Test Free is an Android Tools app developed by Timmy Brolin and published on the Google play store. It has gained around 10000 installs so far, with an average rating of 3.0 out of 5 in the play store.
Bullion Test Free requires Android with an OS version of 4.0 and up. In addition, the app has a content rating of Everyone, from which you can decide if it is suitable to install for family, kids, or adult users. Bullion Test Free is an Android app and cannot be installed on Windows PC or MAC directly.
Android Emulator is a software application that enables you to run Android apps and games on a PC by emulating Android OS. There are many free Android emulators available on the internet. However, emulators consume many system resources to emulate an OS and run apps on it. So it is advised that you check the minimum and required system requirements of an Android emulator before you download and install it on your PC.
Below you will find how to install and run Bullion Test Free on PC:
If you follow the above steps correctly, you should have the Bullion Test Free ready to run on your Windows PC or MAC. In addition, you can check the minimum system requirements of the emulator on the official website before installing it. This way, you can avoid any system-related technical issues.
| Bullion Test Free APK 1.7 | 6.22 MB | 1.7 |
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