Preparation for Quiz 11(Physical Science) PDF

Preview

Summary

Preparation for Quiz 11(Physical Science)
(abeka)...

Description

Preparation for Quiz 11.2-11.3 Physical Science 9th Grade Abeka Academy

Sound Defined as vibration travel through a medium in the form of longitudinal pressure waves intensity the strength of a sound wave loudness the effect of intensity on the way the human ear perceives sound decibel a smaller unit pitch the effect of frequency on the way the human ear perceives sound audible sound sound that can be heard infrasonic sound sound with pitches below the audible range ultrasonic sound pitches above audible range Doppler effect this change in frequency caused by an object's motion supersonic speeds above the speed of sound subsonic while speeds below the speed of sound shock wave construction interference between the wave in this 'sound cone' produce a violent compression pulse Sonic boom when shock wave reaches the ear, a loud noise....... is heard or often felt behind the shock wave, no sound is heard because the sound waves interfere destructively reverberation the multiple reflections caused causing this persistent of sound are known Echo a sound heard distinctly after being reflected from some object Sonar Sound Navigation and Ranging absorption the process of dissipating the energy of sound waves in matter scanning sonarsophisticated forms of sonar acoustic study of sound reverberation time the time required for sound like handclap to die away Tuning fork a well known device for producing pure musical sound of definite pitch...