Soothing Sounds for the Mind

Know Thy Brainwaves

Brainwaves are the synchronized electrical impulses emitted from neurons communicating with each other. Signals from brainwaves are detectable from the cerebral surface and measured with electroencephalography (EEG). Brainwaves are defined in terms of size or amplitude (measured in microvolts) and frequency (measured in cycles per second or hertz).

Brain waves are broadly categorized by frequency as follows:

Delta Waves (0.5-4 Hz): Delta represents deep sleep or a deeply relaxed state. These are the slowest, highest-amplitude waves, occurring during deep, dreamless sleep. They are essential for restoration and tissue repair. We increase Delta waves to decrease our awareness of the physical world and access information in our unconscious mind.

Theta Waves (4-8 Hz): Theta represents a deeply relaxed, inward focus. Theta waves are slower and can induce a more relaxed, quieter mind. Theta is associated with deep meditation, REM sleep, and vivid visualization. These waves are linked to creativity and intuition. Theta is a space for accessing memories, emotions, and sensations. Theta waves are strong during internal focus, meditation, and prayer, bridging the state between wakefulness and sleep. It relates to the subconscious mind.

Alpha Waves (8-12 Hz): Alpha represents an awake yet relaxed state. Alpha waves are characterized by passive attention and occur when we inhabit a calm, relaxed state. For example, in daydreaming or light meditation. Alpha bridges conscious thinking to the subconscious mind. You can increase Alpha by closing your eyes or taking deep breaths or decrease Alpha by thinking or calculating. When Alpha predominates, most people feel at ease and calm.

Beta Waves (12-30 Hz): Beta represents an active state of focus, alertness, and heightened intellectual activity. Beta waves dominate when we engage in active thinking, conversation, and problem-solving. Beta waves are associated with fast brain activity needed for making decisions and processing information about the world around us. We operate in Beta when we have our eyes open and are listening, thinking critically, analyzing, evaluating, and using judgment. While Beta is regarded as a normal rhythm, it can predominate in those who are particularly alert or anxious.

Gamma Waves (30-100 Hz): Gamma represents a high level of concentration. Gamma waves are associated with high-level information processing, peak performance, and learning. These are the fastest waves, frequently representing flashes of insight. When the brain needs to process information from its different areas simultaneously, it resorts to Gamma.

Faster may not always be better. The slower our brainwaves, the calmer and more relaxed our minds are. Of course, a calm and relaxed mind may hold a greater capacity for depth of thought and resourceful decision-making.

Why Sound Healing

“Since the human body is over seventy percent water and since sound travels five times more efficiently through water than through air, sound frequency stimulation directly into the body is a highly efficient means for total body stimulation, especially at the cellular level. Direct stimulation of living cellular tissue using sound frequency vibration has shown marked cellular metabolism and therefore a possible mobilization of a cellular healing response.”

Dr. Jeffrey Thompson, Director of the Center for Neuroacoustic Research at The California Institute for Human Science.

Neuroscience has long recognized the powerful effects of music, think Mozart, and sound frequencies on brain activity and the nervous system. Sound healing —or neuroacoustic music—is a genre of sound therapy that uses particular acoustic stimuli and sound frequencies, patterns, and vibrations to influence brain function.

Sound healing draws upon the therapeutic aspects of sound frequencies to establish equilibrium within the mind, body, and spirit. Curated by a sound practitioner, sounds generated with sound healing instruments help to harmonize the mind, rejuvenate the body, and elevate the spirit.

As sounds wash through the water-rich cells of our bodies, they initiate a natural healing response and encourage the release of stress and tension. By stimulating the vagus nerve and inducing a meditative state, the soothing sounds promote deep relaxation and calm the mind.

The body is designed to shift into survival mode automatically when something is perceived as threatening or frightening. Emotional trauma, stress, and grief can leave us feeling anxious and overwhelmed, often pushing us into survival mode. We do what we must to get through each day. We may become irritable, disconnected, or even apathetic, while our emotional responses—anger, sadness, or frustration—become more intense.

Sound healing can lead us from surviving to thriving. It supports the nervous system in finding a way back to calm. The healing sound waves resonate with the brainwaves and the rest of the body to encourage returning to an optimal state of balance. This sound resonance activates the parasympathetic nervous system, helping us shift from a state of fight-or-flight into deep rest and rejuvenation.

Because our brainwaves tend to synchronize with external sound frequencies, sound healing can influence our brainwave patterns. It synchronizes brainwaves to specific frequencies that correspond to different states of consciousness. It shifts the brain from active Beta into calm Alpha and Theta states, allowing for profound stress reduction and mental regeneration.

If you have tried sound healing, you may already know that the ethereal sounds of crystal bowls bring joy and ease. The deep, resonant tones from Tibetan or Himalayan metal bowls disrupt mental loops. The complex frequencies of the gong quiet the analytical mind and release tension. Sounds from tuning forks and chimes may also come into play.

A sound healing session typically involves lying comfortably on a mat in a small or large group setting and also individually. A sound practitioner plays instruments for 30–60 minutes, guiding the participants into a meditative state.

The calming effects of sound healing help lower cortisol levels and promote a sense of inner calm. This, in turn, supports the body’s natural ability to heal, recover, and reconnect with its inner sense of safety and peace. The physical effects are reduced muscle tension and lowered blood pressure.

Allie Petrova
Health and Wellness Committee