1. J. Stuart Bolton
Ph.D. Institute of Sound and Vibration Research, Southampton University, UK.
Poroelastic materials and applied signal processing
Professor of Mechanical Engineering
Wave propagation and sound radiation
Sound Field visualization
Poroelastic materials
Noise Control
Americas Editor (with Patricia Davis) of the Journal of Sound and Vibration
Funding from: 3M, Sony, Cummins Engines, Boeing, Raytheon Aircraft . . .

2. Optimization of Acoustic Treatments
3 foams , 2 air space, 3 panel F O A M 1 2 3
AIR
Panel 2
Panel 3
Panel 1
Incidence 1 Tc
Transmitted
Reflection Rc
Area I
Z=0
Z=L1 Z= L2 L3 II L4 L5
III IV V VI
VII
Honeycomb panel
solve for
Area II
Area IV
Panel motion
Area V
Area III
Area VI
Area VII
Apply b.c.’s at each interface

3. B&K Four-mic TL tube
SEM – Thinsulate

4. Component Noise: e.g. Tire Radiation Analysis Procedure
SPL & Sound Intensity
on a hemisphere
surrounding a tire
[ Direct BEM ]
radiation field characteristics
based on Acoustic Radiation Mode
(Acoustic Transfer Vector)
Sound Power
Radiation Efficiency
Radiation Mode Contribution
[ Structural Harmonic FEM ]
structural wave propagation
based on surface normal velocities

5. Acoustical Holography for Noise Source Identification: e. g
Acoustical Holography for Noise Source Identification: e.g. rolling tire at 21 mph (128 Hz)
n  3
Frequency
# of nodes
164 Hz
8 (n=4)
140 Hz
6 (n=3)
115 Hz
4 (n=2)
From Dispersion Curve