The technique used to transmit audio signals in television broadcasts is

Frequency Modulation (FM): The audio signal is transmitted using frequency modulation because it offers better noise immunity and higher sound quality compared to amplitude modulation. This means the sound quality is less affected by static and electrical interference. Amplitude Modulation (AM): The video (picture) signal in analog television broadcasts is transmitted using amplitude modulation (specifically, vestigial sideband modulation). AM is used for video because it requires less bandwidth than FM, which is crucial for the high bandwidth demands of video signals. Digital Television: In modern digital television broadcasting (such as ATSC or DVB systems), both audio and video are transmitted as part of a single, highly compressed digital data stream, using digital modulation techniques like 8VSB or QAM.