Free Download Engineering | Science | Technology Books

File : pdf, 3.25 MB, 205 pages

TOC

PART 1: LUMPED ACOUSTICAL SYSTEMS
SIMPLE OSCILLATION
FORCED OSCILLATIONS(SIMPLE SPRING-MASS SYSTEM)
MECHANICAL RESISTANCE
CHARACTERIZING DAMPED MECHANICAL SYSTEMS
ELECTRO-MECHANICAL ANALOGIES
METHODS FOR CHECKING ELECTRO-MECHANICAL ANALOGIES
EXAMPLES OF ELECTRO-MECHANICAL ANALOGIES
PRIMARY VARIABLES OF INTEREST
ELECTRO-ACOUSTIC ANALOGIES

Electro-acoustical Analogies
TRANSDUCERS – LOUDSPEAKER
Acoustic Transducer
Magnet Motor Drive System
Loudspeaker Cone System
Loudspeaker Suspension
MOVING RESONATORS
Moving Resonators Example

PART 2: ONE-DIMENSIONAL WAVE MOTION
TRANSVERSE VIBRATIONS OF STRINGS
Introduction What is a wave equation?
One dimensional Case Characterization of the mechanical system
TIME-DOMAIN SOLUTIONS
d’Alembert Solutions
Example of Time Domain Solution
BOUNDARY CONDITIONS AND FORCED VIBRATIONS
Boundary Conditions
Wave Properties
Forced Vibrations

PART 3: APPLICATIONS ROOM ACOUSTICS AND CONCERT HALLS
Introduction
Sound Fields
Room Coefficients
Sound Decay and Reverberation Time
Great Halls in the World
BASS REFLEX ENCLOSURE DESIGN

Introduction
Effects of the Port on the Enclosure Response
Quantitative Analysis of Port on Enclosure
Development of Low-Frequency Pressure Response
Alignments
Butterworth Alignment
Quasi-Butterworth Alignment
Chebyshev Alignment
Choosing the Correct Alignment
MEDIA
Introduction
Changes in Media
Properties Due to Sound Wave Characteristics
Why Coupled Acoustic Media in Acoustic Filters?
Effects of High-Intensity, Ultrasonic Waves in Acoustic Media in Audio Frequency Spectrum
An Application of Coupled Media in Acoustic Filters

NOISE IN HYDRAULIC SYSTEMS
Noise in Hydraulic Systems
Sound in fluids
Source of Noise
Fluidborne Noise (FBN)
Structure borne Noise (SBN)
Transmission Airborne noise (ABN)
Noise reduction
Hydraulic System noise

BASIC ACOUSTICS OF THE MARIMBA
Introduction
Components of Sound
Why would the marimba need tuning?
Tuning Myths

HOW AN ACOUSTIC GUITAR WORKS

SPECIFIC APPLICATION-AUTOMOBILE MUFFLER
BESSEL FUNCTIONS AND THE KETTLEDRUM
FILTER DESIGN AND IMPLEMENTATION
Introduction
Basic Wave Theory
Basic Filter Design
Actual Filter Design
FLOW-INDUCED OSCILLATIONS OF A HELMHOLTZ RESONATOR AND APPLICATIONS
FEEDBACK LOOP ANALYSIS ACOUSTICAL
CHARACTERISTICS OF THE RESONATOR
Lumped parameter model Production of self-sustained oscillations
APPLICATIONS TO SUNROOF BUFFETING

ACOUSTICS IN VIOLINS
Acoustics of the Violin
How Does A Violin Make Sound?

MOVING COIL LOUDSPEAKER
MOVING COIL TRANSDUCER
The Magnet Motor Drive System
The Loudspeaker Cone System
The Loudspeaker Suspension
Modeling the Loudspeaker as a Lumped System

ATTENUATION OF SOUND WAVES
AR MUFFLERS
NOISE FROM COOLING FANS
HUMAN VOCAL FOLD
MICROPHONE DESIGN AND OPERATION
PIEZOELECTRIC TRANSDUCERS
INTRODUCTION VIBRATIONS & DISPLACEMENTS
DYNAMIC PERFORMANCE
RESONANT DEVICES
APPLICATIONS TECHNIQUE
SEALED BOX SUBWOOFER DESIGN
ACOUSTIC GUITARS
Introduction Strings, Neck, and Head Bridge
Soundboard Internal

BASIC ROOM ACOUSTIC TREATMENTS
ROOM ACOUSTIC TREATMENTS FOR “DUMMIES”
BOUNDARY CONDITIONS AND WAVE PROPERTIES
ROTOR STATOR INTERACTIONS
Noise emission of a Rotor-Stator mechanism
Optimization of the number of blades
Determination of source levels

Download      :     pdf1