Acousticians have a challenge that few outside the industry may be aware of…and it involves a starter pistol.
During acoustic testing, sometimes you need a big omnidirectional sound source to measure the reverberation time of a space. The noise needs to be louder than absolutely everything else. It needs to be impulsive. (No time to escalate.) And it needs to stop almost immediately.
In testing smaller spaces, you can blow up a large balloon and pop it. As you might imagine, this is no fun if there isn’t any compressed air handy. (Or an intern—as some of our crew remember from their college days.) But in a large space—say an auditorium or an arena—the popping of a balloon, simply isn’t loud enough.
Enter the starter pistol.
It is loud, omnidirectional, impulsive and the sound falls off immediately. Seemingly, it is a perfect solution…except that storage is awkward, you can’t own one without a license in New York, you can’t take it on a plane, and apparently—as we learned this week—you can’t order “blanks” in Texas.
On the upside, testing with a starter pistol has a Mythbusters sort of charm. We used it in our testing for CUMC this week. If you look closely you can see the “smoking gun.”
And if you think using starter pistols present an interesting dynamic, don’t even get us started talking about the use of yachting cannons… (No, that is not a punchline.)