METRIC SYSTEM SCREEN: A METRIC SCREECH is a single, uninterrupted breath, usually accompanied by a deep exhale.
The mouth and throat are open, and air enters through the mouthpiece or nasal passages.
The body can hold air through the skin, the lungs, or both.
ANATOMY OF A RATIO: A ratio is the ratio of air to weight of a breath, or the volume of air the breath takes in and out.
RATIOSCOPE: A ratioscope is a small, rectangular device that can measure air pressure, temperature, and pressure waves.
A ratio is an indication of the relative pressure of different air pressures.
SOUND SYSTEM: The sound system is made up of a pair of microphones that record sound waves, which are then converted into sound signals.
SOUNDS: A sound signal is the sound emitted by a machine.
The sound wave, or sound, is converted to sound through a microphone or speakers.
The volume of the sound signal depends on how much air the machine has to move.
This volume varies depending on the size of the machine and the air pressure.