Can you hear me now?

Been trying to post more, wish I had something more interesting to say. Been teaching waves- sound and the EM spectrum. Told my kids about the mosquito tone. (BEWARE- it is annoying!)Of course, I had to play it for them- several times- without their knowledge. I kept turning it up until finally someone complained. I can't hear it too much- but damn what a headache- and it makes me nauseous.