This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
BeatFrequenciesHzHz. en Beat frequencies waveform from combining Hz and Hz sine wave pure tone Image was generated using the open source Audacity audio editor own JamesCrook Audio Waves Beat frequencies
Page 2023 Free-images.com. All images are Public Domain