Which ultrasonic toothbrush has the least noise and vibration? This is for my 12-lb dog, who has a correspondingly small head. He's already great about letting me brush with a manual toothbrush, which I do nightly, but still had some periodontal pockets at his recent dental cleaning. I think I can get him to accept an ultrasonic one if I introduce it very gradually, but I want to get the gentlest one possible. Related issues inside. [more inside]
I am planning to buy a jewelry cleaner for my brother-in-law who sells antique jewelry (and other antiques). Will an ultra-sonic cleaner be more useful than a steam cleaner or visa-verse. Or, does one need both to be effective?
Neighbor is using an ultra-high-frequency device against us at very high decibels. It causes constant low-grade nausea and a long-lasting ringing in the ears afterwards. Problem is, it can't really be heard because its such a high-frequency. Cops have come to our house, felt the nausea and ear-ringing themselves, but refuse to do anything about it because they can't "hear" it and we have no way of recording it. My question is: Can you point me towards a device that can record high decibel sound in very high frequencies so we can show objectively that this is happening? [more inside]
Duffy was agitated tonight when we were watching the bats at sunset. Was he agitated because he could hear them? [more inside]
Ultrasonic cleaning for disposable contact lenses: good idea or not? [more inside]
Can a 17kHz sound transmit through windows? [more inside]
Anyone have first hand experience with ultrasonic cleaners that they purchased for jewelry and eyeglass cleaning? [more inside]
Does anyone have any experience with these these ultrasonic mouse repeller things? Do they actually repel the mice? [more inside]