The assigned frequencies, spaced 200 kHz apart, range from 88 to 108 MHz.
In the United States, amplitude modulation (AM) radio broadcasting, for instance, is done at frequencies between 535 and 1,605 kilohertz (kHz); at these frequencies, a wavelength is hundreds of metres or yards long, and the size of the antenna is therefore not critical.
Usually frequency is expressed in the hertz unit, named in honour of the 19th-century German physicist Heinrich Rudolf Hertz, one hertz being equal to one cycle per second, abbreviated Hz; one kilohertz (kHz) is 1,000 Hz, and one megahertz (MHz) is 1,000,000 Hz.
The Fourier-transform instrument has the advantage of providing higher resolution (1 kilohertz [kHz] relative to 30 kHz) and of exhibiting a much simpler spectrum due to the low sample temperature that insures that the majority of the molecules are in the few lowest energy states.
Commercial AM stations operate at frequencies spaced 10 kHz apart between 535 and 1,605 kHz.
Frequencies of between 50 kHz (thousands of hertz) and 1,000 MHz (millions of hertz) are usually measured by means of a tuned inductance-capacitance circuit.
But anyone who has fiddled with an AM radio at night understands that after the sun sets, the whole world comes alive between 535 and 1705 kHz.
It's like saying that the iPod earbuds have 7-channel surround sound and an astonishing 20 Hz to 20 kHz flat frequency response — just because they can play back the same album as a set of $50,000 speakers.
The sounds, generated by a synthesizer under the hood with a speaker in the front driver's side wheel well, range from 2.5 kHz at the high end of the spectrum to 600 Hz at the bottom.
If the music is really important to you (and if there are no copy protection mechanisms on the CDs), I recommend you spend time to extract the audio from the CDs as files (16 bit/44.1 kHz, LPCM) and store those files as preservation backups on redundant external drives (or some combination of drive and cloud).
