CSD 572 Exam 1 || A+ GRADED Solutions.

what are the three prerequisites for sound? correct answers 1. energy source 2. vibrating source 3. a medium through which the disturbance travels _________= an audible disturbance of a medium produced by a source correct answers sound sound is generated when air molecules are _____________ by a vibrating object correct answers pushed together and apart the study of the physics of sound correct answers acoustics why study acoustics? correct answers 1. sounds of speech can be used to infer what is happening physiologically 2. non-invasive 3. relatively quick method -measurement of distance -extent of spatial separation between 2 points correct answers length quantity of matter in a body correct answers mass any physical event that occurs on a regular basis correct answers time -property of matter whereby a mass in motion will tend to stay in motion... until acted upon by an outside force -a mass at rest will tend to stay at rest, until outside force acts upon it correct answers inertia amount of force per unit area correct answers pressure -a force that causes a deformed structure to return to its original shape -AKA restoring force correct answers elasticity the decrease in amplitude of vibration over time correct answers damping opposition to motion correct answers impedance -motion of a mass in alternating opposite directions when displaced -can be shown graphically (sound wave) correct answers vibration/oscillation the time it takes for each vibratory cycle correct answers period number of cycles per second (Hz) correct answers frequency maximum points of displacement on a wave correct answers amplitude expiration is mostly _______ correct answers passive