PPT-L6 and L7 Sound Intensity, Sound Level/Loudness (Decibels), The Ear

519 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. 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 Presented by . Vinoth. . Kulaveerasingam. QMUL ELE021/ELED021/ELEM021 • 5 Mar 2012. Paper by . Jorg. . Langner. and Werner . Goebl. Visualizing Expressive Performance in Tempo-Loudness Space. What is the aim?. Midterm 1 Feb 3. rd. and 4. th. . Midterm 2 March 9. th. and 10. th. Final April 20. th. and 21. st. Idea journal assignment is due on last day of class. Textbooks. Sensation and Perception. Fundamentals of Sensation. UCOP Safety Meeting . March 2010. Developed by Karen Hsi, UCOP EH&S Student Intern. Noise and Acoustics. Noise and Acoustics. Hazardous noise exposures occur. On the job…. And off the job…. Measuring Noise. More Properties of Sound. Resonance. Definition: when a force is applied to an object in repeated motion at exactly the natural frequency, an increase in amplitude occurs.. Important points: force applied AT the natural frequency!. www.sciencebuddies.org. Reflected. Absorbed. Transmitted. Sound waves. Sound levels are measured in . decibels. (abbreviated dB). Long-term exposure causes hearing damage. Immediate hearing damage. Decibels are a . Sound is a compression wave - it only “looks” like a wave if we plot air pressure against time. time ->. Air Pressure. Period - amount of time for one cycle. Frequency = number of cycles per second (1/Period). 1. Lecture 44 – Lecture 45. Sound. Ozgur. . Unal. Sound Waves. 2. When an object vibrates, it . creates sound waves.. Remember that sound waves . are compressional waves.. When an end of the tuning fork moves outward, it forms a compression on that side by pushing the molecules in air together.. Sensory . System. 3 Parts. : Outer – Middle - Inner. Outer Ear: Auricle. Called the . Pinna. . Fx. : Collects sound waves. Visible part of the ear, outside the head. Outer Ear: External Auditory Canal. 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 . Section 6.5 Beginning on page 327. Properties. Because logarithms are the inverse functions of the exponential functions, properties of logarithms are similar to properties of exponents. . Product Property:. 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. 1. Which statement accurately describes the mathematical relationship between the intensity of a sound and the decibel rating?