The song was a repetition of single notes, with a frequency of around 6.4 kilohertz.
From the guardian.co.uk
That's a good thing, as bats'frequency range covers only roughly 20 to 100 kilohertz.
From the sciencedaily.com
The bandwidth of magnetic amplifiers extends to the hundreds of kilohertz.
From the en.wikipedia.org
The rate is also variable, capable of ranging from kilohertz to gigahertz.
From the en.wikipedia.org
Brazilian free-tailed bats have a frequency range of 20 to 40 kilohertz.
From the newscientist.com
They used an ultrasound source operating at a frequency of 22 kilohertz.
From the newscientist.com
Working with a Hollywood sound studio, Kanuma's team mixed tones above and below 1 kilohertz.
From the latimes.com
A further 600 hertz is needed for overhead management, giving a total of just four kilohertz.
From the economist.com
The series resonance is a few kilohertz lower than the parallel one.
From the en.wikipedia.org
More examples
One thousand periods per second
The hertz (symbol: Hz) is the SI unit of frequency defined as the number of cycles per second of a periodic phenomenon. One of its most common uses is the description of sine wave, particularly those used in radio and audio applications.
Unit equal to 1000 hertz.
One thousand Hertz (see also MHz and GHz).
One thousand hertz. A measurement often used to reference radio frequencies.
Radio or television frequency equivalent to 1,000 cycles per second. 'Amplitude Modulation (AM)' is a radio signal between 550 and 1600 kiloHertz. See also 'Hertz (Hz)' & 'megaHertz (MHz)'.
A unit of frequency denoting one thousand (10^3) Hz.
(KHz) - In radio frequency (RF) transmissions, KHz (sometimes kHz) is used to describe 1,000 cycles per second, or 1,000 Hertz.
A unit of frequency measurement equal to 1,000 cycles per second (Hertz).