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AudioAcoustics

Serving the Acoustics Community Since 1994

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May 30, 2003

A few more interesting articles:

Earthquake Warning System: a system developed by Professor Richard M. Allen of the Univeristy of Wisconsin-Madison. The system provides a warning by detecting the vibrations from faster P-waves (compression waves) before the slower, and more damaging S-waves (shear waves) shake the surface. (click here to see animations of S-, P- and surface waves).

The fight over airplanes flying over Minuteman National Park has reached the New York Times (free registration required). I’m not touching that one…


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May 29, 2003

MBTA tries to reduce Red Line Noise: residents of Beacon Hill prompted the MBTA to install resilient fasteners in a section of the Red Line tunnel. The T went with Pandrol’s Vanguard track support system.

RTD Gives Up On Plan To Reduce Noise, Vibrations: “According to the Denver Post, the district spent about $250,000 on tests and experimental padding to try to quell the vibrations, but a recent study showed the efforts did not help.”

Spotswood residents tell of speeding, water woes : an example of uneven road surfaces causing vibration problems. The moral here is keep your roads in decent shape!

Bad vibes reveal risk of rail track buckling: The article describes a method developed by engineers at the University of Illinois at Urbana-Champaign to measure laterial stress in rail using vibration measurements. Interesting…

Rail firms on horns of dilemma over noise levels: the bad news is that railroad horns are a source of major annoyance. The good news is that there is a lot of research to minimize this disruption. But (IMO) as long as railroads continue to be sued for grade crossing accidents, the RR will continue to blow the horns.

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May 25, 2003

USA Today has an article on Yet Another Directive Loudspeaker Technology.

Random thought of the day: why do projects always come in bunches?


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May 19, 2003

South America was fun, but I’m happy to be back in the United States

A couple of articles on the problems of making you product too quiet:

Edgerton Residents Discuss Damage, 106 dB Noise: construction activity adjacent to an MIT dormitory is disturbing the students.


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May 12, 2003

A small indication of my messed-up my musical tastes:

“Neon Lights, Nobel Prize,
When a leader speaks, that leader dies”
“By now you should’ve somehow
Realized what you gotta do”
“Even when the skies were gray
You would rub me on my back and say
‘Baby it’ll be okay’”
“I feel the night explode
when we’re together ”
“What are you thinking?
Do you know about us back then?”
“I know you don’t believe that it’s true,
I never meant any harm to you. ”

(The music store is going to bankrupt me.)

I was thinking about offering a cash reward for however could identify those six songs, but since song lyrics are easily found using Google, I decided against it.


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May 06, 2003

Off to Montevideo for a week. No email, but I will be reachable by phone


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