How does it work? Sound moves through the fluid parts of your body 4.5 times faster than through the air. And 12 times faster through your bones (which is why ultrasound imaging works.) So the moment you begin to hum, you are giving yourself a sonic massage, inside and out. Humming vibrates every cell, right down to your DNA. It causes your brain to release relaxing endorphins. It also stimulates production of nitric oxide, which helps maintain cellular health, strengthens your immune system, improves circulation and digestion, clears your mind and reduces stress.
A study published in the American Journal of Respiratory and Critical Care Medicine showed that humming increased blood flow in the sinuses, and boosted production of Nitric oxide 15 times higher. Other studies show that humming improves hearing and reduces nasal congestion. Humming at 25-150 Hz has been known to speed healing of bone, tendons, ligaments and muscles. 25-50 Hz increases bone density. 100 Hz helps decrease dyspnea and shortness of breath. In another study, exposure to 50-150 Hz provided relief for 80% of those suffering chronic and acute pain.
HUMMING FOR HEALTH—HERE’S HOW: Close your eyes. Now breathe in and out through your nose, with your lips closed. As you release your breath, gently allow a soft humm to float out. Use a note that feels good to you, one where you easily feel the vibration in your body. Be gentle. Louder is not better. Continue for a few minutes, without straining until you feel the relaxation response. For maximum health, gradually work up to 10-20 minutes a day.
Do you feel “humming challenged”? Here’s another option. Get a cat that loves to purr and hug tight. Research shows that cats purr at healing sound frequencies of 25-150 Hz. They purr when giving birth, when frightened and when severely injured. Their bones heal more rapidly after fractures than dogs (who don’t purr, of course). So if you don’t want to hum, you can try some “purr therapy”.