Brain imaging has shown that when we hear an unpleasant noise the amygdala modulates the response of the auditory cortex heightening activity and provoking our negative reaction. Researchers were then able to study the brain response to each type of sound.

Characteristics of Musical Sound

• Pitch: The pitch is the characteristics of a musical sound which depends upon the frequency.
• Loudness: The loudness of musical sound is related to the intensity of the sound the higher is the intensity, the higher will be the loudness.
• Quality or timber: It measure the complexity of sound.

Music is sound with a discrete structure. Noise is sound with a continuous structure. Music is composed of sounds with a fundamental frequency and overtones.

Noise pollution is an invisible danger. Noise pollution impacts millions of people on a daily basis. The most common health problem it causes is Noise Induced Hearing Loss (NIHL). Exposure to loud noise can also cause high blood pressure, heart disease, sleep disturbances, and stress.

The Top 10 Quietest Places on Earth

• Tak Be Ha Cenote, Mexico.
• Antarctica.
• Makgadikgadi Pans, Botswana.
• Zurich, Switzerland.
• Landmannalaugar, Iceland.
• Kielder Mires, England.
• Kelso Dunes, Mojave Desert, US.
• Olympic National Park, Washington, US.

The world record was obtained in 2015 from a Microsoft campus in which the returning sound was around -20 decibels. Which humans cannot hear. So it really depends on the chamber your in. An advanced chamber: you cannot hear yourself.

45 minutes

1. characterized by an absence or near absence of noise: a quiet street. 2. characterized by an absence of turbulent motion or disturbance; peaceful, calm, or tranquil: a quiet glade; the sea is quiet tonight. 3.