PPT-Chapter 13 - sound

131 Sound Waves Objectives Explain how sound waves are produced Relate frequency to pitch Compare the speed of sound in various media Relate plane waves to spherical waves Recognize the Doppler effect and determine the direction. 1.1 The Nature of Sound . I. Essential Question: . What is sound and how does it move? . II. Key Vocabulary. Density:. the amount of matter in a given space or volume. . Found by dividing the mass by the volume. . Sound waves are made up of a series of regions of high and . low pressure. . The areas of high pressure are called . compressions. . The . areas . of low pressure are called . rarefactions.. Wave energy travels through the material. But a particular piece . Sound waves carry energy that can be used to do work, like forcing the eardrum to vibrate.. The energy can be great enough to cause damage to windows and buildings (sonic boom). Sound Intensity. The amount of energy transported per second by a sound wave is the . An old riddle ….. If a tree falls in a forest, and no one hears it, does the tree make a sound?. What is “sound”?. Sound Waves. To a scientist, a tree makes a sound whether someone hears it or not.. REFLECTION OF SOUND. The reflection of sound follows the same laws as the reflection of light. Angle of incidence=Angle of Reflection. Sound waves can be reflected by hard/solid surfaces.. Example: Walls, Buildings and Cliffs. Sound waves are longitudinal!. Sound can be explained by understanding:. Speed. Intensity. . and loudness. Frequency and pitch. Most people hear sound between the frequency of 20Hz and 20,000Hz. . Anatomy of Sound. Wave. particles vibrate parallel to the direction of the motion of the wave. Terminology. Compressions. : areas where particles come closer together. Rarefactions: . regions where particles are further apart. What’s That Sound?: A Comparison of Sound Absorption of Different Commercial Flooring Which material has the most substantial absorption when exposed to various sound variations? Of the variables that are to be tested, carpet will be the one to have the greater absorption due to its characteristics of not being solidified by its padding, softness, and flexibility. Sound Chapter 12 Sound hunt Remain as quiet as you can for 1 minute. I will tell you when to begin, and when to stop. In the margin of your paper, write down all of the different sounds that you hear in the environment around you. Music is just a wonderful feeling that has the potential to blow our minds and we sometimes wonder what it takes to create this magic. Well surely it is not easy to get all your instruments and tools right and synchronize them perfectly as you wish. For more details please visit: https://www.soundcrafting.com/ You need to be an expert while choosing the best hip hop samples for making the hottest and exclusive hip hop beats for latest musical sound tracks. You need to visit the best site for hip hop drum sounds and get the latest and hottest exhilarating sound pack for your sound track. You require choosing a leading sound agency with specializes in exclusive hip hop music production through latest hip hop sound packs. For more details please visit: https://www.soundcrafting.com/ While ordering the most unique FL studio sound packs plus sound files you will have to search the best sound agency sites of product galleries. As a leading music producer you will need to look for the most exclusive sound buy options for creating the best musical albums. For more details please visit: https://www.soundcrafting.com/ Review: How Does Sound Move?. Images c. ourtesy . of BSCS. What did you learn last time about how sound travels to our ears?. Key Science Ideas. All . soundmakers. vibrate and make the air around them vibrate. . Two major types of digital sound:. Sampled . sound: digital recording of previously existing analog sound wave.. File contains numeric values to describe the amplitude of the sound wave at a particular instant..