If the generated file length is too short, set the Repeat or Loop option is your media player, so the file will play infinitely.
What is tone generator used for?
The tone generator can be used for testing the speakers and the electrical wiring of the speakers or for tinnitus and hearing loss frequency detection.
Hearing range
Human hearing range is usually 20Hz-20000Hz. If you can't hear a low or high frequency, it might be caused by a hearing problem, or the speaker can not generate the required frequency when the frequency is very low or very high.