NATS 1720 Study Guide - Midterm Guide: Basilar Membrane, Sound Power, Linear Density
16 Dec 2017
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Document Summary
Sound pressure is measured in units of pascal (pa), represented by p. Sound intensity is measured by w/m2 and in units of decibels (db), represented by i. Frequency is the oscillations per second (1/t) and in units of hertz (hz), represented by f. Wavelength is the length of one complete oscillation, represented by and in units of meters (m). Period is the time it takes to complete one full oscillation, represented by t, measured in seconds. The rate at which the waves crest arrives at the listener depends on two things: the speed v with which the wave travels toward the listener, and the wavelength . Frequency can be measured as: f = stiffness/inertia, for all vibrating systems. An ideal gas is measurable by an inverse relationship between air pressure and volume, p2/p1=v1/v2. This formula indicates that volume decrease (or compression) causes a pressure increase, as well as pressure decrease causes a volume increase.
