ASLP 3030 exam 1 questions and answers well explained.

ASLP 3030 exam 1 questions and answers well explained. What is acoustic? - correct answers.Acoustics refers to the scientific study of sound waves in terms of how it is generated and transmitted. Why do we study wave motions and oscillation in acoustics? - correct answers.We study the properties of wave motion and oscillation in order to have a precise understanding of sound waves and their characteristics. What are the essential properties of sound source and sound medium? - correct answers.Mass and elasticity -Elasticity is the ability of an object to return to its original form after being stretched or compressed. The sound source and sound medium are independent of each other. Sound source is the sound generator (example, a tuning fork). Sound medium is the sound carrier (example, the air or helium). The frequency and period of a sound are determined by the properties of the source. The speed of sound transmission is determined by the properties of the medium. How do sound waves propagate? - correct answers.When set into motion, air molecules oscillate back and forth about their equilibrium positions, causing adjacent air molecules to move closer together and air pressure to increase (condensation) and then move further apart causing air pressure to decrease (rarefaction). It is the disturbance which travels, not the individual air particles in the medium. Sound waves propagate in a spherical, longitudinal fashion What do amplitude, frequency and period of sound mean? - correct answers.Amplitude refers to the displacement of particles during vibration. It is related to sound pressure and intensity. Frequency refers to how many cycles per second the vibration takes place. Period refers to the amount of time to complete one cycle of vibration. Period (in seconds) is the inverse of frequency (in Hertz). Period (Ts) = 1/Frequency (Hz) Frequency (Hz) = 1/Ts (Period in seconds) If the period is in seconds, frequency is in Hertz