On the theory that porpoises are sensitive to noise, engineers and biologists developed beer-can-size devices that emitted pinging noises underwater.
It was essentially an unfinished metal structure, gutted by artillery, train tracks, and locomotives that called to mind the railroad built by Stanley, cassava fields, cut-rate hotels, greasy spoons, bordellos, Pentecostal churches, bakeries, and noise engineered by men of all generations and nationalities combined.
Mr. Brooks is a noise control engineer in Vernon.
DAVID COLLINGS Trumbull The writer is an independent noise control engineer and a member of a national group developing a standard for classroom acoustics.
The topic is approached from the point of view of the noise control engineer, who requires a reliable tool for estimating the long-term noise impact and a method for determining the effects of noise reduction measures.
So when the sun shines relentlessly as it did this August, proving that all-glass roofs like the hall's really do create a greenhouse effect conditions inside become almost unbearable.Fearful of external noise, BBC engineers broadcasting the Proms will not allow doors to be opened during concerts.
These are practical enough to be of interest to acoustic and noise control engineers and material manufacturers.
("You could load in anything you like: the EastEnders soundtrack, or a clip-clopping horse noise," says the engineer, smiling. "Warwick University is now experimenting with different sounds to find the optimum safest sound").
I want to talk to your engineers,'" recalls Ram Krihnam, a Cadillac noise-and-vibration engineer.
Another trick is using chevrons – scalloped edges – on the engine exhaust nozzle, to help muffle engine noise at the source, according to Mahendra Joshi, Boeing's chief engineer for noise, vibration and emissions.
