Word: hz
(lookup in dictionary)
(lookup stats)
Dates: all
Sort By: most recent first
(reverse)
...mating call? First off, the findings, published in the Jan. 9 issue of the journal Science, dispel a few former assumptions about A. aegypti's behavior: that the female is deaf and a passive participant in the mating ritual and that the male cannot hear frequencies above 1,000 Hz. In fact, the Cornell researchers have established that both the male and female of this subtropical species can detect frequencies as high as 2,000 Hz and that they are equal participants in the courtship process...
...chase here) and checking them out at a range of 1 to 2 cm. If the female has recently mated, she'll rebuff the male's advances, but once a love connection is made, the two will adjust their wing speeds: females typically beat their wings at about 400 Hz, or beats per second, and males flap at a frequency of about 600 Hz; however, when two potential mates spy each other, they adjust their wing speeds to create a harmonic of about 1,200 Hz. Once the male satisfactorily matches the female's overtone, mating commences. (Unfortunately, scientists lack...
Whatever the outcome of this study, don't expect to see an electronic pest-control device set to 1,200 Hz to block A. aegypti's mating call. At that frequency, Hoy says, "it would drive humans nuts...
Coming late this summer: custom-built headphones that reproduce frequencies ranging from 20 Hz to 120 kHz, generally considered a broader range than humans can hear. After a set is purchased, it's adjusted to one of three sizes to fit the wearer's head. And for the $2,600 list price, you also get your choice of colors--red or blue...
...warehouse.) The fact is that most of this stuff comes from club and rave culture, where booming soundsystems are the norm. Below a certain volume threshold, it loses effect—thus meaning—completely. Leftfield drum & bass producer Equinox makes dub basslines so deep (below 30 Hz) they’re barely audible at high volume on standard speakers. They’re meant to literally shake your body, seize your insides. And studio wizards like Foul Play used to program breakbeats that were so rapid and microscopic they had the tactile effect of crawling over your skin...