2 hours of mall sound, noise from general store, crowd sound for sleep.\rbr\rbr2 hours of mall sound, noise from general store, crowd sound for sleep.\rbr\rbr4 hours of mall sound, noise from general store, crowd sound for sleep.,\rbr\rbr4 hours of mall sound, noise from general store, crowd sound for sleep.\rbr\rbrOne hour of mall sound, noise from general store, crowd sound for sleep.