播音 is a separable verb (离合词) meaning 'to broadcast' on radio or television. The object 音 can split off from 播 when aspect markers, measure words, or durations come between them — for example, 播过音 ('have broadcast'), 播了三个小时的音 ('broadcast for three hours'). You cannot put a direct object after 播音; instead, the content being broadcast is introduced with a different structure (e.g. 播新闻).