a tuning fork is producing sound. prove with an activity that sound is produced by it due to vibration

We take a tuning fork and big iron plate and then hit the plate by tuning fork. Due to this the prongs of tuning fork start to vibrate.
Now we immerse this vibrating tuning fork in water after striking. We would see disturbances produced in the water in the form of ripples and waves. This confirms that they vibrate. Vibrating tuning fork produce the sound. The sound produced by it is propagate through the medium. So we can hear it.