节拍音乐（英语：Beat Music）、英国节拍乐（英语：British Beat）或默西之声（英语：Merseybeat）（特指来自默西河畔的利物浦和曼彻斯特的乐队）是一种属于流行乐和摇滚乐的音乐流派，形成于1960年代早期的英国。节拍音乐是摇滚（rock and roll）、嘟-喔普、噪音爵士乐和节奏布鲁斯这几种类型的融合。这一流派中诞生了制造“英国入侵”风潮的许多乐队，他们从1964年起占领了美国流行乐榜单，并对日后流行乐和摇滚乐的发展有重要影响，包括树立了摇滚乐队的典型形态——由主音吉他、节奏吉他、贝斯和架子鼓组成。

Beat music, British beat, or Merseybeat (after bands from Liverpool and nearby areas beside the River Mersey) is a pop and rock music genre that developed in the United Kingdom in the early 1960s. Beat music is a fusion of rock and roll (mainly Chuck Berry guitar style and the midtempo beat of artists like Buddy Holly), doo-wop, skiffle and R&B. The genre provided many of the bands responsible for the British Invasion of the American pop charts starting in 1964, and provided the model for many important developments in pop and rock music, including the format of the rock group around lead, rhythm and bass guitars with drums.