The connection between sound and meditation has ancient roots, with many cultures using sound for healing and spiritual practices. For example, Australian Aboriginal tribes have used the didgeridoo as a sound healing instrument for over 40,000 years, while Tibetan and Himalayan spiritual ceremonies often incorporate singing bowls. Sound meditation, a form of focused awareness, has gained popularity, particularly through sound baths ;which use Tibetan singing bowls, quartz bowls, and bells to guide listeners into a meditative state. These practices illustrate how the experience of sound is not limited to hearing but also involves tactile vibrations and frequencies.

While science is still exploring the mechanisms behind sound & healing properties, current research is showing promising results. A review of 400 scientific articles on music as medicine revealed strong evidence that music offers mental and physical health benefits, such as improving mood and reducing stress. Notably, rhythm—more so than melody—has been found to provide physical pain relief. A study published in the Journal of Evidence-Based Integrative Medicine reported that a one-hour sound meditation significantly reduced tension, anger, fatigue, anxiety, and depression while enhancing a sense of spiritual well-being. The meditation featured a variety of instruments, including Tibetan and crystal singing bowls, gongs, Ting-shas (tiny cymbals), dorges (bells), didgeridoos, and other small bells, with singing bowls being the primary instrument used for 95% of the session.

Participants, regardless of their prior experience with sound meditation, experienced marked reductions in tension and anxiety afterward. There are several theories that attempt to explain the link between sound experiences and deep relaxation or physical pain relief. One theory suggests that sound affects the body through vibrational tactile effects, potentially stimulating touch fibers that influence pain perception. For instance, a study involving people with fibromyalgia found that ten sessions of low-frequency sound stimulation, administered twice weekly over five weeks, improved sleep and reduced pain, leading nearly 75% of participants to reduce their use of pain medication.

Sound-based vibration therapy has been shown to help alleviate pain from conditions such as arthritis, menstrual cramps, postoperative recovery, and knee replacement surgery. Additionally, this treatment has been found to improve mobility, reduce muscle pain and stiffness, increase blood circulation, and lower blood pressure.

Another theory regarding the benefits of sound centers on the concept of binaural beats brain entrainment, which suggests that listening to certain frequencies can synchronize and alter brainwaves.

Brain activity is displayed in the form of brainwaves, which are rhythmic, repetitive frequencies that can be measured using an electroencephalogram (EEG). There are four main categories of brainwaves, each associated with different levels of activity and consciousness:

1.  Beta waves are the fastest brainwaves, occurring when the brain is active
   and mentally engaged.
2. Alpha waves are present when the brain is in a relaxed state, such as after
   completing a task or during meditation.
3. Theta waves are linked to daydreaming and the rapid eye movement (REM)
   phase of sleep. These waves often occur during activities like long-distance
   driving or running, times when ideas and creativity tend to flow.
4. Delta waves are the slowest brainwaves, associated with deep, dreamless
   sleep.

The concept behind binaural beats is that the brain synchronizes its brainwave frequency to the difference in hertz between tones played in each ear. Depending on the frequency, this can induce states of deep relaxation associated with beta waves or meditative, trance-like states linked to theta waves.

Reference taken from :

Reference taken from – https://www.psychologytoday.com/au/blog/urban-survival/201907/the-healing-power-of-sound-as-meditation