Chapter Eighteen - Posted on 2017-06-12 by Chelsea George

In chapter 18 I learned about acoustics and monitoring. I learned from a previous chapter that acoustics is the study of how sound waves behave in an environment. I learned that acoustics deals with two things, first it is the science that deals with the production, control, transmission, reception, and effects of sound. Second it refers to the qualities that determine the ability of an enclosure to reflect sound waves. I learned in chapter 18 that Isaac Newton was the first to formulate a relationship between the speed of sound in gases by relating to density and compressibility in a medium. I also learned in chapter 18 about the reception of sound and that we can't experience sound without our physical bodies. I learned that by the 1840s there was a pretty good idea about what sound is and how sound is produced.

In the studio Renegade explained the types of characteristics of sound: absorption- sound is absorbed by everything, even air. The way sound is absorbed by a surface depends on the frequency of the sound, the angle of the sound wave and the acoustic impedance of both the surrounding air and the surface that strikes. Renegade talked about how soft, pliable, porous materials are good acoustic absorbers and dense, hard, impenetrable materials like metals are the most reflective. The lower the frequency that needs to be absorbed, the larger the absorption apparatus that needs to be.