QWORK Tuning Fork 440HZ, 2 Pcs Singing Tone Tuning Set, Steel Tuning Forks with Wood Resonator Box, for Various Experiments

I got this for creating binaural beats for entraining brainwaves states. After trying many, these are great because the material is robust and heavy and they ring out for a decent length (still have to keep whacking them on a hockey puck to get em going again, but that's expected). The best part is the adjuster on the one fork for changing the pitch. This allows you to create 8hz beats for alpha or 4hz beats for theta or whatever you want. Loving that freedom because it saves buying several forks.I do this as a quick fix sometimes after a stressful day at work to change from a high beta state to alpha, it really works and is huge for mental health and general quality of life. For this purpose, I highly recommend.Small detail: the adjusting piece is plastic on mine, not metal as shown. Still does the job though.

Tuning fork and box are very well made. Fork fits snugly into receptacle and pitch is good. Very resonant.

Excelente producto

The media could not be loaded. I use as learning kit for my son

Good demo for sound/vibration demo. Frequency is only off by a few Hz. The coatings on the fork have a few chips off. It could be done better.