My 2 cents on this fairly new phenomenon, and if it helps with anxiety...
The idea that listening to certain music can in fact boost your immune system and help anxiety might sound a little crazy, but the science in fact backs it up. Soothing music is known to decrease the levels of the stress hormone cortisol. The state that people find themselves in while listening to soothing music leads to psychological changes, which eventually lead to stress reduction and direct immune enhancement.
Now what if we combined that soothing sound with what is now known as binaural beats, first of all what is binaural beats? Binaural beats have been researched for almost 170 years, as we know the human brain goes through many frequency cycles everyday. The different frequencies produce different effects to the human consciousness, using this information it's been discovered that the brains receiving and operating frequency can in fact be altered by sound waves.
Binaural beats are what you hear when two separate tones are heard in each ear, when you have headphones on for example and in the left ear you hear a nice steady tone playing, and in the right ear another tone starts playing that is slightly higher in pitch then the first tone, your brain then perceives a rhythmic beat which may sound like quick waves as it mixes the two sounds together.
Binaural beats have been shown to entrain the brain into many different states depending on the “frequency” of the binaural beats, the frequency is measured in hertz or Hz. Try it for yourself with a relaxing guided meditation in the background. Enjoy and share your feedback - youtube.com/watch?v=cfVPQWp...
x 
Health Anxiety sufferers. 
Music and emotions
Dear Anxiety.......
Extra heart beats
