During a sports broadcast such as the Olympics, the network showing the program will frequently use several on-field microphones and even add sound effects to match the viewer’s expectations of what the event should sound like. Many sounds – such as an arrow flying toward a target, or a balance beam creaking under the gymnast’s weight – are simply not audible, even from close up. In this case, pre-recorded sound effects are added while the program is being broadcast.
An interesting read:
Some Olympic Sounds Are Fake – Boston.com
There may be apps that do that. You can definitely find spectrum analyzers that will measure ultra low.
Is there an APP that can measure the ultra low frequency levels?
.Plaster is a viable middle and high frequency absorber. We have used it many times in new builds that have…
Hi Dennis I'm curious what you think of acoustic perforated plaster - say CST Galaxy -on particularly ceilings in music…