Experimental identification of the radiation resistance matrix

Joseph Milton; Jordan Cheer; Steve Daley

doi:10.1121/1.5102167

Experimental identification of the radiation resistance matrix

The Journal of the Acoustical Society of America ◽

10.1121/1.5102167 ◽

2019 ◽

Vol 145 (5) ◽

pp. 2885-2894 ◽

Cited By ~ 2

Author(s):

Joseph Milton ◽

Jordan Cheer ◽

Steve Daley

Keyword(s):

Radiation Resistance ◽

Experimental Identification ◽

Resistance Matrix

Download Full-text

Sound power of vibrating cylinders using the radiation resistance matrix and a laser vibrometer

The Journal of the Acoustical Society of America ◽

10.1121/10.0002870 ◽

2020 ◽

Vol 148 (6) ◽

pp. 3553-3561

Author(s):

Caleb B. Goates ◽

Cameron B. Jones ◽

Scott D. Sommerfeldt ◽

Jonathan D. Blotter

Keyword(s):

Radiation Resistance ◽

Laser Vibrometer ◽

Sound Power ◽

Resistance Matrix

Download Full-text

Active structural acoustic control using an experimentally identified radiation resistance matrix

The Journal of the Acoustical Society of America ◽

10.1121/10.0000858 ◽

2020 ◽

Vol 147 (3) ◽

pp. 1459-1468 ◽

Cited By ~ 1

Author(s):

Joseph Milton ◽

Jordan Cheer ◽

Steve Daley

Keyword(s):

Radiation Resistance ◽

Acoustic Control ◽

Resistance Matrix ◽

Structural Acoustic Control

Download Full-text

The Use of Radiation Resistance Measurements to Assess the Noise Characteristics of Machines

Volume 3B: 15th Biennial Conference on Mechanical Vibration and Noise — Acoustics, Vibrations, and Rotating Machines ◽

10.1115/detc1995-0457 ◽

1995 ◽

Author(s):

Everett H. Paddock ◽

Gary H. Koopmann

Keyword(s):

Radiation Resistance ◽

Combustion Engine ◽

Operating Conditions ◽

Surface Radiation ◽

Production Model ◽

Sound Power ◽

Volume Velocity ◽

Noise Characteristics ◽

Low Profile ◽

Resistance Matrix

Abstract An experimental method for assessing the noise characteristics of machines is developed. The method is based on a computation of the radiated sound power of a vibrating structure in terms of its acoustic surface radiation resistance and surface volume velocity. To measure acoustic surface radiation resistance, a probe is developed which consists of a low profile loudspeaker and a small microphone, both of which are moveable over the surface of the structure. As an application of the the method, the sound power produced by two valve covers of a 3.3L V6 internal combustion engine, a current production model and the prototype of a new design, is computed and compared. Based on the probe measurements made on a quiescent engine, a surface resistance matrix was generated for the two valve covers. Measurements of the volume velocity of the valve covers were made at two engine operating conditions: 1800 and 5300 RPM. After combining each of the velocity measurements with the resistance matrix, the results indicate that the prototype valve cover radiates significantly less sound power than the production cover at both operating conditions.

Download Full-text