Volumes | Noise Control and Acoustics Division Conference | American Society of Mechanical Engineers Digital Collection

Topics: Flow instability , Locks (Waterways) , Cavities , Fluids , Damping , Flow (Dynamics) , Oscillations , Shear (Mechanics) , Acoustics , Control theory

Sound Radiation From a Propeller in a Submerged Rib-Stiffened Duct

Wenlong Zhang, Hafiz M. Atassi

NCAD 2008; 31-42doi:https://doi.org/10.1115/NCAD2008-73019

Abstract

View Articletitled, Sound Radiation From a Propeller in a Submerged Rib-Stiffened Duct

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Topics: Ducts , Propellers , Sound , Dipoles (Electromagnetism) , Acoustics , Blades , Dispersion relations , Flow (Dynamics) , Radiation (Physics) , Bending (Stress)

Beamforming in Reflecting Environments: An Experiment in a Reverberation Chamber

Robert P. Dougherty, William D’Andrea Fonseca, Samir N. Y. Gerges

NCAD 2008; 43-51doi:https://doi.org/10.1115/NCAD2008-73020

Abstract

View Articletitled, Beamforming in Reflecting Environments: An Experiment in a Reverberation Chamber

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Topics: Sound reverberation , Corners (Structural elements) , Automobiles , Eigenvalues , Engines , Errors , Noise (Sound) , Reflection , Turbofans , Vacuum

Ray-Based Acoustic Localization of Discreet Sound Sources in a Highly Reverberant Environment

Natasha A. Chang, David R. Dowling

NCAD 2008; 53-57doi:https://doi.org/10.1115/NCAD2008-73021

Abstract

View Articletitled, Ray-Based Acoustic Localization of Discreet Sound Sources in a Highly Reverberant Environment

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Topics: Acoustics , Cavitation , Signals , Bubbles , Dimensions , Water tunnels , Wavelength , Cycles , Noise (Sound) , Reflection

The Effect of Flow Coefficient on the Self Noise Generated by a Ducted Rotor

David B. Stephens, Scott C. Morris, William K. Blake

NCAD 2008; 59-67doi:https://doi.org/10.1115/NCAD2008-73029

Abstract

View Articletitled, The Effect of Flow Coefficient on the Self Noise Generated by a Ducted Rotor

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Topics: Flow (Dynamics) , Noise (Sound) , Rotors , Blades , Wire , Fluids , Inflow , Mach number , Turbomachinery , Turbulence

Calculating the Speed of Sound in an Engine Exhaust Stream

Justin D. Keske, Jason R. Blough

NCAD 2008; 69-77doi:https://doi.org/10.1115/NCAD2008-73031

Abstract

View Articletitled, Calculating the Speed of Sound in an Engine Exhaust Stream

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Topics: Engines , Exhaust systems , Speed of sound , Algorithms , Combustion , Gases , Temperature , Approximation , Cloud chambers , Density

Understanding Roughness Noise: Progress in Analytical Modeling and Testing, Part 1—Shear Rapid Distortion Theory

R. Martinez, J. S. Uhlman, C. M. Ting, B. S. Paul, J. M. Anderson, M. C. Goody, D. O. Stewart

NCAD 2008; 79-89doi:https://doi.org/10.1115/NCAD2008-73036

Abstract

View Articletitled, Understanding Roughness Noise: Progress in Analytical Modeling and Testing, Part 1—Shear Rapid Distortion Theory

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Topics: Modeling , Noise (Sound) , Shear (Mechanics) , Surface roughness , Testing , Flow (Dynamics) , Boundary layers , Gages , Turbulence

Near Field Aeroacoustic Experimental Investigation in Low Speed Axial Fans

Stefano Bianchi, Alessandro Corsini, Franco Rispoli, Anthony G. Sheard

NCAD 2008; 91-100doi:https://doi.org/10.1115/NCAD2008-73039

Abstract

View Articletitled, Near Field Aeroacoustic Experimental Investigation in Low Speed Axial Fans

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Topics: Acoustics , Anechoic chambers , Blades , Chords (Trusses) , Clearances (Engineering) , Computer simulation , Databases , Fans , Flow (Dynamics) , Impellers

Model Calculations of Wind Noise Measured in a Flat Surface Under Turbulent Flow

Jiao Yu, Richard Raspet, Jeremy Webster, Kevin Dillion

NCAD 2008; 101-110doi:https://doi.org/10.1115/NCAD2008-73044

Abstract

View Articletitled, Model Calculations of Wind Noise Measured in a Flat Surface Under Turbulent Flow

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Topics: Noise (Sound) , Turbulence , Wind , Pressure , Fluctuations (Physics) , Flow (Dynamics) , Microphones , Wind velocity , Acoustics , Army

Trailing Edge Noise From Blunt and Sharp Edge Geometries

Daniel W. Shannon, Scott C. Morris, William K. Blake

NCAD 2008; 111-118doi:https://doi.org/10.1115/NCAD2008-73052

Abstract

View Articletitled, Trailing Edge Noise From Blunt and Sharp Edge Geometries

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Topics: Noise (Sound) , Boundary layer turbulence , Boundary layers , Geometry , Pressure , Flat plates , Flow (Dynamics) , Microphone arrays , Scattering theory , Separation (Technology)

A New Road-Side Array-Based Method for Characterization of Truck Noise During Passby

William K. Blake, Paul Donovan

NCAD 2008; 119-128doi:https://doi.org/10.1115/NCAD2008-73055

Abstract

View Articletitled, A New Road-Side Array-Based Method for Characterization of Truck Noise During Passby

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Topics: Noise (Sound) , Roads , Trucks , Vehicles , Highways , Testing , Acoustics , Calibration , Flow (Dynamics) , Instrumentation

On the Far-Field Propagation of High-Speed Jet Noise

Brenton Greska, Anjaneyulu Krothapalli

NCAD 2008; 129-133doi:https://doi.org/10.1115/NCAD2008-73071

Abstract

View Articletitled, On the Far-Field Propagation of High-Speed Jet Noise

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Topics: Noise (Sound) , Nozzles , Radiation (Physics) , Absorption , Jets , Spectra (Spectroscopy) , Accounting , Aircraft , Engines , Signals

Sound Transmission in a Lined Annular Duct With Mean Swirling Flow

Ying Guan, Kai H. Luo, Tong Q. Wang

NCAD 2008; 135-144doi:https://doi.org/10.1115/NCAD2008-73081

Abstract

View Articletitled, Sound Transmission in a Lined Annular Duct With Mean Swirling Flow

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Topics: Ducts , Sound , Swirling flow , Linings (Textiles) , Exterior walls , Acoustics , Finite element methods , Flow (Dynamics) , Optimization , Rotors

Wind Noise Reduction for Outdoor Measurement Microphones With Windscreens

Z. C. Zheng, Ying Xu

NCAD 2008; 145-151doi:https://doi.org/10.1115/NCAD2008-73084

Abstract

View Articletitled, Wind Noise Reduction for Outdoor Measurement Microphones With Windscreens

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Topics: Microphones , Noise control , Wind , Flow (Dynamics) , Electrical resistivity , Turbulence , Porous materials , Materials properties , Simulation

Understanding Roughness Noise: Progress in Analytical Modeling and Testing, Part 2—Comparison of Calculations to Data

R. Martinez, J. S. Uhlman, C. M. Ting, B. S. Paul, J. M. Anderson, M. C. Goody, D. O. Stewart

NCAD 2008; 153-165doi:https://doi.org/10.1115/NCAD2008-73091

Abstract

View Articletitled, Understanding Roughness Noise: Progress in Analytical Modeling and Testing, Part 2—Comparison of Calculations to Data

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Topics: Modeling , Noise (Sound) , Surface roughness , Testing , Flow (Dynamics) , Acoustics , Equilibrium (Physics) , Kinematics , Shear (Mechanics) , Turbulence

Active and Passive Noise Control

Active Sound Transmission Control of an Experimental Double-Panel Partition Using Decoupled Analog Feedback Control

Jason Sagers, Jonathan D. Blotter, Timothy W. Leishman

NCAD 2008; 167-174doi:https://doi.org/10.1115/NCAD2008-73018

Abstract

View Articletitled, Active Sound Transmission Control of an Experimental Double-Panel Partition Using Decoupled Analog Feedback Control

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Topics: Active sound transmission control , Feedback , Control equipment , Vibration , Acoustics , Aluminum , Construction , Ducts , Errors , Frequency response

Prediction of Sintered Fibrous Metal Liner Influence on Muffler Sound Attenuation Performance and Noise Emission for Single-Cylinder Motorcycle Engine Exhaust

Mark C. Storm

NCAD 2008; 175-185doi:https://doi.org/10.1115/NCAD2008-73022

Abstract

View Articletitled, Prediction of Sintered Fibrous Metal Liner Influence on Muffler Sound Attenuation Performance and Noise Emission for Single-Cylinder Motorcycle Engine Exhaust

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Topics: Cylinders , Emissions , Engines , Exhaust systems , Metals , Motorcycles , Noise (Sound) , Silencers , Modeling , Acoustics

Noise Source Identification on a Continuous Mining Machine

Hugo E. Camargo, Adam K. Smith, Peter G. Kovalchik, Rudy J. Matetic

NCAD 2008; 187-194doi:https://doi.org/10.1115/NCAD2008-73024

Abstract

View Articletitled, Noise Source Identification on a Continuous Mining Machine

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Topics: Mining machinery , Noise (Sound) , Acoustics , Chain , Machinery , Conveyor systems , Microphones , Noise control , Algorithms , Coal

Effects of Temperature and Humidity on the Sound Absorption of Automotive Sound Absorbing Materials

Edward R. Green, Andrea L. Zent

NCAD 2008; 195-200doi:https://doi.org/10.1115/NCAD2008-73025

Abstract

View Articletitled, Effects of Temperature and Humidity on the Sound Absorption of Automotive Sound Absorbing Materials

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Topics: Acoustical materials , Sound absorption , Temperature effects , Temperature , Automotive industry , Acoustics , Noise control , Vehicles

Using a Dynamometer Along With Road Tests to Measure Vehicle Rolling and Wind Noise

Richard E. Wentzel, Allan Aubert

NCAD 2008; 201-206doi:https://doi.org/10.1115/NCAD2008-73027

Abstract

View Articletitled, Using a Dynamometer Along With Road Tests to Measure Vehicle Rolling and Wind Noise

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Topics: Dynamometers , Noise (Sound) , Roads , Vehicles , Wind , Sports , Tires , Automotive engineers , Engineers , Signals

Noise Control in a Small Enclosure Using T-Shaped Acoustic Resonators

Deyu Li, Jeffery S. Vipperman, Li Cheng

NCAD 2008; 207-214doi:https://doi.org/10.1115/NCAD2008-73034

Abstract

View Articletitled, Noise Control in a Small Enclosure Using T-Shaped Acoustic Resonators

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Topics: Acoustics , Noise control , Noise (Sound) , Design methodology , Computer simulation , Electromagnetic spectrum , Radiation (Physics) , Resonance

An Investigation of the Characteristics of a Bayesian Military Impulse Noise Classifier

Brian Bucci, Jeffrey Vipperman

NCAD 2008; 215-224doi:https://doi.org/10.1115/NCAD2008-73046

Abstract

View Articletitled, An Investigation of the Characteristics of a Bayesian Military Impulse Noise Classifier

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Topics: Impulse (Physics) , Military systems , Noise (Sound) , Testing , Artificial neural networks , Scalars

Adaptive IIR Filter Using Variable Step Size for Active Noise Control Inside a Short Duct

Ho-Wuk Kim, Sang-Kwon Lee

NCAD 2008; 225-231doi:https://doi.org/10.1115/NCAD2008-73062

Abstract

View Articletitled, Adaptive IIR Filter Using Variable Step Size for Active Noise Control Inside a Short Duct

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Topics: Ducts , Filters , Noise control , Algorithms , Finite impulse response filters , Signals , Control systems

Passive Noise Reduction in an Automotive Compartment

Mariana R. Kruntcheva

NCAD 2008; 233-242doi:https://doi.org/10.1115/NCAD2008-73073

Abstract

View Articletitled, Passive Noise Reduction in an Automotive Compartment

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Topics: Acoustics , Finite element analysis , Noise control , Cavities , Automobiles , Computer simulation , Corporate average fuel economy , Design , Dynamic systems , Finite element model

Magnetic Noise in Induction Motors

Radu S. Curiac, Sumit Singhal

NCAD 2008; 243-247doi:https://doi.org/10.1115/NCAD2008-73077

Abstract

View Articletitled, Magnetic Noise in Induction Motors

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Topics: Electromagnetic induction , Motors , Noise (Sound) , Design , Design engineering , Rotors , Stators

Active Noise Control of a Cooling Fan in a Short Duct

Charles E. Kinney, Alberto Villalta, Raymond A. de Callafon

NCAD 2008; 249-259doi:https://doi.org/10.1115/NCAD2008-73086

Abstract

View Articletitled, Active Noise Control of a Cooling Fan in a Short Duct

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Topics: Cooling , Ducts , Noise control , Control equipment , Design , Noise (Sound) , Acoustics , Computers , Data acquisition systems , Errors

A Method for Noise Reduction in Hydraulic Lines

James Wang, Michael Paidoussis, Luc Mongeau

NCAD 2008; 261-269doi:https://doi.org/10.1115/NCAD2008-73088

Abstract

View Articletitled, A Method for Noise Reduction in Hydraulic Lines

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Topics: Design , Dimensions , Engineering systems and industry applications , Fluid dynamics , Fluid structure interaction , Fluids , Hydraulic pumps , Materials properties , Noise (Sound) , Noise control

Structural Acoustics

Application of the Vincent Circle to Noise Suppression

D. W. Herrin, G. Sampath

NCAD 2008; 271-275doi:https://doi.org/10.1115/NCAD2008-73009

Abstract

View Articletitled, Application of the Vincent Circle to Noise Suppression

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Topics: Noise (Sound) , Stiffness , Acoustics , Computer simulation , Construction , Optimization

Using the Inverse Boundary Element Method to Predict Sound Pressure in the Far Field

D. W. Herrin, J. Liu, J. Han, S. Cheah, D. J. Kato

NCAD 2008; 277-280doi:https://doi.org/10.1115/NCAD2008-73015

Abstract

View Articletitled, Using the Inverse Boundary Element Method to Predict Sound Pressure in the Far Field

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Topics: Boundary element methods , Sound pressure , Vibration , Generators , Particulate matter

Computing Resonant Frequencies and Coupled Mode-Shapes of Structural-Acoustic Systems Using the Finite Element Method

Rui M. Botelho

NCAD 2008; 281-294doi:https://doi.org/10.1115/NCAD2008-73017

Abstract

View Articletitled, Computing Resonant Frequencies and Coupled Mode-Shapes of Structural-Acoustic Systems Using the Finite Element Method

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Topics: Acoustics , Finite element methods , Mode shapes , Resonance , Finite element analysis , Fluids , Boundary-value problems , Damping , Radiation (Physics) , Space

An Equivalent-Acoustic Finite Element Method for Modeling Sound Absorbing Materials in the Automobile Passenger Compartment

Donald J. Nefske, Shung H. Sung

NCAD 2008; 295-300doi:https://doi.org/10.1115/NCAD2008-73026

Abstract

View Articletitled, An Equivalent-Acoustic Finite Element Method for Modeling Sound Absorbing Materials in the Automobile Passenger Compartment

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Topics: Acoustical materials , Acoustics , Automobiles , Finite element methods , Modeling , Computers , Finite element analysis , Finite element model , Materials properties

Confirmation Testing and Preliminary Dynamic Measurements of a Journal Bearing Test Rig

J. Harrison Gyurko, Stephen A. Hambric, Karl M. Reichard

NCAD 2008; 301-309doi:https://doi.org/10.1115/NCAD2008-73028

Abstract

View Articletitled, Confirmation Testing and Preliminary Dynamic Measurements of a Journal Bearing Test Rig

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Topics: Journal bearings , Testing , Bearings , Fluid films , Modeling , Displacement , Numerical analysis , Pressure measurement

Responses of Stochastic Shell Structures to Non-Gaussian Random Excitations

Cho W. S. To

NCAD 2008; 311-318doi:https://doi.org/10.1115/NCAD2008-73030

Abstract

View Articletitled, Responses of Stochastic Shell Structures to Non-Gaussian Random Excitations

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Topics: Random excitation , Shells , Acoustics , Finite element analysis , Radiation (Physics)

A Revisit of the Coupling Loss Factors in Determining Power Flows in Structures

Hongan Xu, Wen L. Li

NCAD 2008; 319-329doi:https://doi.org/10.1115/NCAD2008-73048

Abstract

View Articletitled, A Revisit of the Coupling Loss Factors in Determining Power Flows in Structures

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Topics: Flow (Dynamics) , Seas , Waves , Energy conservation , Shapes

Mode-Based Frequency Response Analysis With Frequency-Dependent Material Properties

Andrzej Bajer

NCAD 2008; 331-334doi:https://doi.org/10.1115/NCAD2008-73051

Abstract

View Articletitled, Mode-Based Frequency Response Analysis With Frequency-Dependent Material Properties

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Topics: Frequency response , Materials properties , Algorithms , Damping , Stiffness , Finite element analysis , Vehicles

Design of Acoustic Cloak by Transmission Line Approach

Shu Zhang, Nicholas Fang

NCAD 2008; 335-338doi:https://doi.org/10.1115/NCAD2008-73053

Abstract

View Articletitled, Design of Acoustic Cloak by Transmission Line Approach

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Topics: Acoustics , Design , Transmission lines , Anisotropy , Compressibility , Density , Noise control , Simulation , Ultrasound , Wave propagation

Prediction and Modification of Broadband Interior Noise in Enclosures Using Energy-Intensity BEM and Absorption Scaling

Krista Michalis, Donald Bliss, Linda Franzoni

NCAD 2008; 339-347doi:https://doi.org/10.1115/NCAD2008-73057

Abstract

View Articletitled, Prediction and Modification of Broadband Interior Noise in Enclosures Using Energy-Intensity BEM and Absorption Scaling

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Topics: Absorption , Boundary element methods , Noise (Sound) , Acoustics , Reflection , Scaling laws (Mathematical physics)

Study of Coupled Acoustic Wave Propagation in a Circular Metal Pipe for the Correlation Method

Ho-Wuk Kim, Sang-Kwon Lee, Min-Soo Kim

NCAD 2008; 349-356doi:https://doi.org/10.1115/NCAD2008-73059

Abstract

View Articletitled, Study of Coupled Acoustic Wave Propagation in a Circular Metal Pipe for the Correlation Method

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Topics: Acoustics , Metals , Pipes , Wave propagation , Waves , Leakage , Shells , Circular cylinders , Cylinders , Ducts

Characterization of High Frequency Radiation From Panels Subject to Broadband Excitation

Donald Bliss, Linda Franzoni, Krista Michalis

NCAD 2008; 357-361doi:https://doi.org/10.1115/NCAD2008-73063

Abstract

View Articletitled, Characterization of High Frequency Radiation From Panels Subject to Broadband Excitation

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Topics: Excitation , Radiation (Physics) , Damping , Waves , Flow (Dynamics) , Mach number , Membranes , Modal analysis , Noise (Sound) , Pressure

Sound Attenuation and Prediction of Porous Media Properties in Hybrid Ducts Utilizing Spatially Periodic Area Changes

Lisa J. Burton, Donald B. Bliss, Linda P. Franzoni

NCAD 2008; 363-371doi:https://doi.org/10.1115/NCAD2008-73066

Abstract

View Articletitled, Sound Attenuation and Prediction of Porous Media Properties in Hybrid Ducts Utilizing Spatially Periodic Area Changes

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Topics: Ducts , Porous materials , Acoustics , Acoustical properties , Air flow , Density , Engines , Linings (Textiles) , Shapes , Silencers

Noise Reduction Strategies Using Multi-Element Flexible Structures

Qinxian He, Donald B. Bliss, Linda Franzoni

NCAD 2008; 373-382doi:https://doi.org/10.1115/NCAD2008-73069

Abstract

View Articletitled, Noise Reduction Strategies Using Multi-Element Flexible Structures

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Topics: Acoustics , Damping , Elastic moduli , Flexible structures , Noise control , Resonance , Sound , Spectra (Spectroscopy) , Waves

Efficient Finite-Element Modeling With Equivalent-Fluid Porous Materials

Jeffrey L. Cipolla, Ron Gerdes, Ram Dravida

NCAD 2008; 383-388doi:https://doi.org/10.1115/NCAD2008-73070

Abstract

View Articletitled, Efficient Finite-Element Modeling With Equivalent-Fluid Porous Materials

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Topics: Finite element analysis , Fluids , Modeling , Porous materials , Acoustics , Aerospace industry , Damping , Engineering systems and industry applications , Insulation , Materials properties

An Efficient Sandwich Plate Element for Predicting the Vibro-Acoustic Response of Laminated Steel Panels

Kamel Amichi, Noureddine Atalla, Robert Ruokolainen

NCAD 2008; 389-396doi:https://doi.org/10.1115/NCAD2008-73080

Abstract

View Articletitled, An Efficient Sandwich Plate Element for Predicting the Vibro-Acoustic Response of Laminated Steel Panels

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Topics: Acoustics , Cavities , Displacement , Excitation , Finite element analysis , Modeling , Radiation (Physics) , Skin , Steel , Symmetry (Physics)