Android near ultra-high frequency listener
* - vers. 1.0 * - min/target API 18 - 4.3 * - s4 4.3.1 (18) - testing use * - s5 5.1.1 (22) - install only
Test application for researching methods of receiving audio signals from 18000 Hz to 19950 Hz.
- Alphabet characters (A-Z, a) are represented by frequencies separated by 75 hertz.
- Start tone is 'A' (18000Hz) and stop tone is 'a' (19950Hz). Message must be in alphabetical order.
- included html 5 page (transmitter.html) that consists of js synth and test sequence.