Fundamentals of Acoustics

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Sound in enclosures: Solution to the three-dimensional wave equation in a room with rigid walled boundaries. Room modes and their natural frequencies. Modal statistics; modal density, modal overlap and the Schroeder frequency. The concepts of a diffuse field and average absorption coefficient; the energy balance equation and reverberation time.

Basic auditorium requirements. Sound radiation: The Rayleigh integral for the solution of sound radiation problems. Radiation from a plane vibrating piston. On axis radiation in near and far fields of a circular piston.

Publisher Summary

Directivity and interference. Radiation impedance. Multipole sources: The point monopole source. The point dipole source; vector dipole strength. Concept of quadrupoles. Acoustic source mechanisms. Sound reflection, transmission, refraction and attenuation: Reflection and transmission at a fluid-fluid interface.

ISBN 13: 9780471029335

The transmission and reflection coefficients. Normal and oblique incidence. Sound attenuation. Laboratory sessions: Use of sound level meters. Sound power measurement. This is a one-semester course, three lectures per week with two laboratory sessions.

Fundamentals of Acoustics / Edition 4

Lecture notes and tutorial sheets are provided and one-to-one assistance and verbal feedback is facilitated through six tutorial classes with short tests in some. Past exam papers are supplied to aid personal study, feedback and revision. Blackboard is used to allow the lecture materials and additional material to be disseminated including solutions to past exam papers and recordings of lectures. The students have to write-up two laboratory reports. Students are encouraged to read supporting texts and a booklist is provided.

Fundamentals of Acoustics and Audio | La Salle | Campus Barcelona

Laboratory space and equipment required. Undergraduate Postgraduate taught Postgraduate research Foundation Years Pre-sessional English language courses How to apply Clearing Free online learning Continuing professional development Prospectuses. Module Overview This module provides an introduction to the basic elements of acoustics for the purpose of meeting the fundamental needs of practising engineers.

Aims and Objectives Learning Outcomes Knowledge and Understanding Having successfully completed this module, you will be able to demonstrate knowledge and understanding of: The propagation of longitudinal acoustic disturbances in the form of plane waves and waves in a free environment SM7M. The derivation of the wave equation and Helmholtz Equation from linearised conservation equations SM7M. The behaviour of sound in enclosures including analytical descriptions of sound propagation at both low and high frequencies SM7M, contributes to SM9M. The limitations and characteristics of acoustic sources SM7M.

Methods of estimating source sound power from measurements of sound pressure level and sound intensity under different conditions, and the international standards for the measurement of sound power SM7M, P6, contributes to EL12M. The use of a sound level meter and intensity probe, and the use of standard bandwidths and frequency weightings contributes to P2m. Disciplinary Specific Learning Outcomes Having successfully completed this module you will be able to: Read, understand and interpret the literature relating to basic topics in acoustics contributes to G1.

Model simple acoustical problems involving sources of sound in simple geometries contributes to G1. Undertake acoustic measurements and provide critical analysis and conclusions contributes to P2m, P3 and P6.

Acoustics 101

Manipulate complex numbers in the solution of problems associated with wave motion contributes to SM5m. Produce a formal technical report contributes to G1.

PH 3451: Fundamental Acoustics

Teaching and learning methods This is a one-semester course, three lectures per week with two laboratory sessions. Fundamentals of Acoustics. A short overview of ultrasound in the pure liquids is given because the properties of the media are of less significance. Longitudinal waves, in the most general case, are three-dimensional with a potentially complex geometry.

In this chapter, only two dimensional plane waves thathave the same direction of propagation are considered. Compression waves are able to propagate long distances in the liquid, whereas shear and thermal waves exist only in the close vicinity of phase boundaries. The chapter also gives an overview of acoustics from a rheological point of view.

The acoustic properties of a homogeneous liquid depend on its chemical composition. The background properties that are important in this chapter include the intrinsic attenuation and sound speed.

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