Wideband Frequency Modulation.
WBFM was created in 1993.
The difference between the Narrow Band radio frequency (nbfm) and the Wide Band radio frequency (wbfm) is that Narrow Band provide a higher quality of sound but has fewer channel available to use whilst Wide Band provides a lower quality of audio but has a much larger range of channels available.
Wideband FM (WBFM) is a type of frequency modulation that uses a larger bandwidth than standard FM, typically exceeding 15 kHz. This increased bandwidth allows for higher audio quality and greater fidelity, making it ideal for applications like high-fidelity music broadcasting. WBFM is commonly used in television audio transmission and high-quality FM radio stations. Its wider bandwidth also makes it more resistant to noise and interference compared to narrowband FM.