Air blower - turn off the candle

Phone can produce sound waves with different frequencies. Those sounds can blow air to turn off a near candlelight or move little pieces of paper. This app allows you to generate loud sounds with given frequencies which create sound waves. It's teaches and shows how powerful are noises generated by mobile phones. You can set up and test frequencies between 0 and 2000Hz. Try it on your phone because every speaker is different. Usually YABLO works for tablet speakers with 700Hz and phone speakers between 700 and 1500Hz.