In physics, sound is a vibration, a longitudinal wave that propagates through a medium (usually gas).
Sound propagates also through liquids and plasma as longitudinal wave, but when it passes through solids, it propagates both as a longitudinal and transversal wave.
In human physiology and psychology, sound is the reception of that waves and their perception by our bodies (what we can hear). Humans can perceive sounds in the range of 20 Hz to 20 kHz (this range diminishes with age, noise pollution, illness). Sounds that are below our hearing threshold are called extremely low frequencies (ELF) and sounds above our hearing threshold are called ultra-high frequencies (UHF). Many animals can perceive those frequencies, like cats, dogs, dolphins and whales. Sound is not perceived just by our ears; it is also perceived by our entire bodies (we can feel the vibrations of sounds with certain qualities).
By the principle of sympathetic resonance, pure and clear vibrations produced by sacred instruments and human voice, have a unique power to restore the natural resonance of objects and thus bring balance to the area of activation.
How do we hear sound?
Simplified, sound waves enter the ear and travel through the auditory canal to the eardrum, which is connected to three small bones (hammer, anvil, stirrup) in the middle ear, an air-filled cavity.
sympathetic resonance or sympathetic vibration is a harmonic phenomenon where a passive body responds to external vibrations to which it has a harmonic likeness – ‘like vibration’, ‘same vibe’ if you want, by starting to vibrate
The stirrup is then connected to the cochlea (fluid filled space) in the inner ear. We hear sound when eardrum vibrates within a certain frequency range. The sound is then amplified in the middle ear where it passes from air medium to liquid medium (cochlea). As the liquid in the fluid-filled ducks of the cochlea moves, many thousands of microscopic hair cells move as well. These convert the vibratory motion into electrical signals which are then communicated via neurotransmitters to thousands of nerve cells. The electrical signals then move via auditory nerve to brainstem for processing.
Simplified, sound waves enter the ear and travel through the auditory canal to the eardrum, which is connected to three small bones (hammer, anvil, stirrup) in the middle ear, an air-filled cavity. The stirrup is then connected to the cochlea (fluid filled space) in the inner ear. We hear sound when eardrum vibrates within a certain frequency range. The sound is then amplified in the middle ear where it passes from air medium to liquid medium (cochlea). As the liquid in the fluid-filled ducks of the cochlea moves, many thousands of microscopic hair cells move as well. These convert the vibratory motion into electrical signals which are then communicated via neurotransmitters to thousands of nerve cells. The auditory nerve carries this electrical signal to the brain, which at last turns it into a sound that we recognize and understand.
buddhna 