Your autonomic nervous system consists of two parts: the sympathetic nervous system and the parasympathetic nervous system. Your sympathetic nervous system, as part of your NEM stress response, is responsible for your fight or flight response when presented with stress. The parasympathetic nervous system is involved in metabolism and resting.

Sound vibrations transmit along nerves to various parts of your brain. You can perceive these vibrations as sound. But different sounds cause different reactions in your brain, depending on their frequency. Sound frequency healing may make use of certain frequencies that act on the middle ear, which sends these frequencies to various parts of the brain. These frequencies may affect your pituitary gland, hypothalamus, and thus your NEM stress response in such a way that neurotransmitters throughout the body.

Using sound frequency healing could thus help put your body back into a state of balance, as it may promote proper regulation of your brain, neurotransmitters, and stress response. Your body functions best at sound frequencies between 62Hz and 72Hz. The lower your body’s frequency, the higher your risk of developing health issues. When under 42Hz, for example, you stand a higher risk of developing cancer.

Healing frequencies are a type of sound wave therapy to induce a state of ease and harmony in the body. Different frequencies of sound can have a different effect on human brain activity. It’s believed that once a new frequency gets introduced to your brain, your brain waves feel compelled to sync to it — effectively launching you into a different “brain state” and having an overall holistic effect on your body. The most commonly reported benefits are:

• Reduced stress and anxiety

• Increased focus, concentration, and motivation

• Improved confidence

• Improved sleep

• Better long-term memory

• Deeper meditation

• Lower cholesterol

• Fewer mood swings

Healing frequencies list

• The 40Hz. While not a Solfeggio frequency, this frequency has been linked to gamma brain waves and may help improve memory. Used in studying Alzheimer’s, this frequency may stimulate neural responses, reduce beta-amyloid plaques, and thus help fight the debilitating symptoms associated with dementia. It can also be used as light therapy.

• The 174 Hz. This frequency releases pain and heals sick auras. It can reduce back, lower back, foot, and leg pain. The 174 Hz also takes care of migraines and stress. It soothes brain tissues and evokes feelings of love, courage, safety, and reassurance. 174 Hz targets chakras and the healing parts of the body.

• The 396 Hz. This sound helps is said to remove one from fear and guilt while also helping balance the root chakra to help you feel more grounded. It’s also known to turn grief into joy and give you the boost you need to help you reach your goals.

• The 417 Hz. Listening to this sound is hailed for facilitating change on the physical level, including the physical body. It’s also known to help dissolve feelings of trauma as well as any emotional blocks. Some say it brings a new start to life.

• The 432 Hz. This frequency targets your heart chakra. The tone soothes your soul and encourages mental and emotional clarity and openness. Listening to this tone can help with your spiritual growth.

• The 440 Hz. This tone is also known as cerebral music. It massages your brain and soothes anxiety. The 440 Hz also strengthens your cognitive growth and awakens your third eye chakra.

• The 528 Hz. This frequency may help promote miracles, clarity, and peace, as well as transformations like DNA repair. It’s often credited with helping to remove illness and disease. Called the “miracle note” and love frequency, it reportedly rids the body of any toxicity, ushers in love and confidence, and balances out both your heart and solar plexus chakras.

• The 639 Hz. This frequency could help to heal and promote relationships and reconnecting. It’s said to produce positive feelings and encourage harmony and clear communication. It may also help you build a better relationship with yourself and help you reflect on what is most important to you.

• The 741 Hz. Listening to this level of solfeggio frequencies is reportedly fantastic for finding various solutions while allowing you to fully express yourself truthfully and/or in new ways. It’s also rumored to improve emotional stability, allowing you the space and safety to tap into your intuition.

• The 852 Hz. This frequency is said to help you connect to your intuition as well as the spiritual realms. Another perk? It might prevent you from overthinking and delving deep into negative thought patterns. As a result, your sense of self and inner strength are said to improve, and you reach a new level of energy and spiritual awareness.

• The 963 Hz. This frequency wakes up your intuition and crown chakra. It’s a great way to raise your positive energy and vibrations. To look deeper within yourself, 963 Hz helps you better connect to your inner self and reach your highest vibrational state. In the right mood, you may even reach oneness and journey to the spiritual world. This frequency balances you out and also brings you to your original and perfect state.