4 ms·
These results may out may not apply to humans. I wonder what frequencies were used in the experiment. While anything higher than 20 kHz is beyond humans hearing
by efoto 12y ago
These results may out may not apply to humans. I wonder what frequencies were used in the experiment. While anything higher than 20 kHz is beyond humans hearing range and is called ultrasound, mice can hear sounds as high as 79kHz.
- lambeosaurus 12y agoI'm not entirely sure I understand your concern. Hearing the sound doesn't stimulate change, so whether or not we can hear it doesn't seem to matter. The crux is whether or not ultrasound also stimulates microglia production in humans, and whether or not ultrasound is irreparably harmful to the brain.
- dmd 12y agoUltrasound is typically in the megahertz range. Calling it "sound" is really kind of a misnomer. From the article: Parameters for the ultrasound delivery were 0.7-MPa peak rarefactional pressure, 10-Hz pulse repetition frequency, 10% duty cycle, 1 MHz center frequency, and 6-s sonication time per spot.