PPT-Sound Intensity - decibels

Check last weeks homework Sound Waves some vocab Each cycle of a sound wave includes one condensation and one rarefaction The frequency of the sound wave is the number of cycles per second that pass by a given location. The unit of force is usually Newton where one Newton is approximately the force with which a weight of 0 kg is dragged down to the ground here on earth and area is measured in The unit for pressure is therefore Nm which is also referred to as Pasca Power Decibels Without a Calculator When working with decibels for power signals you can use to help you solve some level conversions without the aid of the calculator This rule states that every time you double a power level there is a 3 dB increa Section 8.5. Key Terms. Audible Sound Waves. Infrasonic Wave. Ultrasonic Wave. Echo. Mach Number (. M. ). Pressure (. p. ). Sound Intensity. Decibel (dB). Categories of Sound Waves. Sound waves fall into three categories covering different ranges of frequencies.. . How is sound produced, how does it travel through the air and how do we hear sounds?. Sound II. As the vocal chords vibrate, the air is alternately compressed and rarefied resulting in a longitudinal pressure wave. Physics - Arrowhead. Mr. Streufert. 2013-14. Learning Targets. Apply wave concepts to the physical and perceived characteristics of a sound wave. Perform calculations involving speed and intensity. Detect audibility and harmonic relationships. pp. 487 - 493. Mr. Richter. Agenda. Podcast Check. Questions about 13.1 Sound Waves. Upcoming Schedule. Notes:. Intensity and Volume. Decibel levels. Forced Vibrations and Resonance. Upcoming Schedule. Hearing, touch, smell. Hearing. Audition: energy form is sound waves – slower range of speeds, but work similar to sound waves. Pitch: how high or low sound is. Timbre: complexity of tone (instrument variations). 5.1.9. You and I are standing next to each other, listening to the exact same steady sound. . Our ears are identical. . You listen for TWICE as long as I do. How does the (average) power compare? (Please average ONLY over the time that the individual is listening!). 5.1.9. You and I are standing next to each other, listening to the exact same steady sound. . Our ears are identical. . You listen for TWICE as long as I do. How does the (average) power compare? (Please average ONLY over the time that the individual is listening!). Properties:. . Numbers:. . Sound intensity and power. Intensity:. P. – power (do not confuse with pressure). E . - . energy. t . - time. Free field (radiation is uniform in all directions):. r . Sound. Vibrations in matter. No one need be. around to hear it.. Composed of Compressions & Rarefactions. . Compressions. are regions of high. molecular density and high pressure.. Rarefactions. 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. This Slideshow was developed to accompany the textbook. OpenStax. Physics. Available . for free at . https://. openstaxcollege.org/textbooks/college-physics. . By . OpenStax. College and Rice University. Noise Audit Training. Updated: April, 2014. Module 2 - Noise Audit . Training. Purpose of this . module. This module provides training on noise required to conduct a noise audit. It covers the following topics:.