This circuit can easily be assembled on a small piece of prototyping board. Use low-current types for the LEDs. They have a low forward voltage and are fairly bright at current levels as low as 1 mA.

The historic noise meter that hung in the rafters of Reynolds Coliseum now hangs in the foyer of the newly renovated Reynolds Coliseum at N.C. State on Sept. 7. Ethan Hyman [email protected] ...

When you shop through retailer links on our site, we may earn affiliate commissions. 100% of the fees we collect are used to support our nonprofit mission. Learn more. Squeaks, hums, rattles, beeps, ...

In a nod to its storied past, Porsche‘s 928 noise test vehicle now sits proudly in the Porsche Museum. Dubbed a “dinosaur” by Harald Mann, a long-time test engineer, this unique vehicle has played a ...

You may have observed that older people have more difficulty following a conversation in a noisy environment. Most people attribute this problem to being deaf. However, many of these people are not ...

HOUSTON, Texas (KTRK) -- Houston police have a new tool this Christmas to help neighbors enjoy some silent nights. "This is a big step up in the equipment compared to what we had before," said Sgt.

It’s music to their ears. City regulators are making a bid to address the bane of New Yorkers’ existence: noise! The city Department of Environmental Protection ...