Sony XBANC85D Balanced Armature Digital Noise-Cancelling In-Ear Headphones (Discontinued by Manufacturer)

[Music] hi if you've been following this channel for a while you know that one of the projects I'm involved in is building an auxilary power unit for our larger drones and one of the issues is that the gasoline engines produce a lot of noise and in order to try to contain or block that noise from getting to the outside world you need to build an enclosure that will accomplish that and do so efficiently in order to design that you have to understand a little bit about how sound is transmitted and so what I've done on the other end of the room is I've set up a speaker and an amplifier and a signal generator to produce some noise now the speaker on the other end of the room is producing an 1,100 Hertz signal that's passing across the room being detected on this microphone and displayed on the Susilo scope now even though you can see the oscilloscope looks like a series of sinusoidal waves