Historically, the channels available to HF users have been limited to a three
kilohertz bandwidth, due to restrictions on sharing available HF bandwidth between military and civilian users.
They support both analogue MPX and digital MPX over AES/EBU at 192
kilohertz.
They sent sound signals from it at a frequency of 3
kilohertz. That's a higher frequency than they used in the Arctic, and so it doesn't travel as far under water, but it can carry more information.
Based on the latest power conversion circuitry, Blue Diamond high-frequency battery chargers' operating frequency exceeds 100
kilohertz to eliminate a residual oscillation ripple.
Polar bears, the only other bears scientists have tested, are less sensitive to sounds at or above 14
kilohertz. Researchers still don't know why pandas have ultrasonic hearing.
Suggested equipment allowed calibration of AET from tens of
kilohertz to several hundred
kilohertz range.
For example, an acoustic wave of 100
kilohertz (kHz), traveling through air, has a wavelength of 3.4 millimeters (mm) -- so it couldn't achieve image resolution smaller than 1.7 mm.
Using an on-chip oscillator operating at 15 kHz (
kilohertz), a low-power timer that consumes very little power wakes the CPU from the idle state at regular intervals to detect contact with the touch panel.
Sonar systems typically move within the low-frequency range (from the
kilohertz range to about 2MHz).
A team led by Zhiqun (Daniel) Deng, a chief scientist at PNNL, evaluated the signals from three commercially available sonar systems designed to transmit signals at 200
kilohertz. The impact of such systems on marine mammals is not typically analyzed because signals at 200
kilohertz can't be heard by the animals.
The signals were broadcast at 33.3
kilohertz rather than the 37.5
kilohertz frequency at which black boxes are supposed to broadcast pings.
China's official Xinhua News Agency reported that the patrol vessel Haixun 01 detected a "pulse signal" on Friday in the southern Indian Ocean at 37.5
kilohertz - the same frequency emitted by the missing plane's black boxes.