Sound Class-IX

This eBook contains detailed description of the chapter related to class exam and other exam.The salient features are : Introduction Production and Propagation of Sound Longitudinal and transverse wave Transverse wave Characteristics of sound Loudness Intensity Difference between loudness and intensity Pitch or Frequency Quality or timbre Music and Noise Terms related to sound waves Reflection of sound Echo Multiple echoes Uses of Multiple Reflection of sound Sound Board Range of frequencies Applications of ultrasound Industrial uses of ultrasound Medical uses of Ultrasound Communication (SONAR) Sonar work