How does sound become noise? People who “own” a noisy process or activity are often surprised when neighbors object strenuously. This article seeks to explain the disconnect, based on my…
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A golden opportunity for source noise control Recent news reports describe how the Golden Gate Bridge now “sings” in high winds. It all started after the recent installation of railings…
No flying cars (yet). No robot maids (yet). No Mars colonies (yet). At least we have active noise cancellation (ANC), right? Experiments with cancellation of sound by sound started as…
In product design it’s not uncommon to take the approach of “waiting to see how noisy the machine turns out”, and only then consider noise control. If you don’t know…
Because decibel differences are difficult for most people to interpret, they often seek to describe noise improvements using a more practical yardstick: how much quieter it’s going to sound. …
The Forbidden Word – “Soundproof” There’s a word I recommend my clients and students never use. It’s the most famous word in noise control: “soundproof”. When I was…
One of the most common noise education resources out there is the dB thermometer. It’s also one of the most potentially confusing to the uninitiated. A medical thermometer gives…
No. 2 in a series on Myths, Misunderstandings, and Magical Thinking about Noise It’s not uncommon for the “decibel” or “dB” to be discussed as if it’s a physical unit…
Products, machines, buildings, and industrial facilities are often designed without giving particular thought to noise emission and it’s impact on people. This sometimes works out, usually because of favorable circumstances…
COOL PROJECTS WHITE PAPER Number: 001 Date: October 31, 2018 Title: Engineering a Quiet Leafblower Result: 8 dBA reduction, rivaling best in class Application Function Stage Methods…
