Sound has an ancient kinship with meditation and healing.
Sound baths is a meditative experience, where the attendees are “bathed” in sound waves. By using repetitive notes at different frequencies, you will be able to remove your thoughts and enter to the meditation stage. Generally, these sounds are created with crystal bowls, gemstone bowls, cymbals, and gongs.
Sound meditation is a type of meditation that focuses on the hearing sense. There is an ancient sound healing ritual practice, similar to modern sound baths, that uses Tibetan singing bowls, quartz and bells in the session. The practices highlighted how the experience of sound manifests not only through hearing but also through tactile physical vibrations and varying frequencies.
Current research has also indicated music has mental and physical health benefits in improving mood and reducing stress. There are many different theories that attempt to explain why sound experiences can be linked with deep relaxation and physical pain relief.
One hypothesis is that sound can numb our pain perception by stimulating touch fiber through the vibrational tactile effects in our body. Study has found that low-frequency sound stimulation improves sleep and decreases pain.
Another hypothesis is that while listening to certain frequencies of the sound, our brain can synchronize and change the electrical activities (brainwave) accordingly. The premise of the second hypothesis is that the brain synchronizes its brainwave frequency to the difference in hertz between tones played in each ear, which, depending on the frequency, can lead one to states of deep relaxation associated with beta waves or meditative theta waves.
Try to discover the sound healing effect next time when you do meditation.
Reference: https://www.psychologytoday.com/intl/blog/urban-survival/201907/the-healing-power-sound-meditation