beating
clicking
dancing
desultory
drumming
flickering
flickery
flicky
fluttering
fluttery
guttering
palpitant
pounding
spattering
spluttering
sputtery
staccato
throbbing
thrumming
thumping
ticking
unsteady
wavering
wavery
noise
buttering
cluttering
muttering
puttering
shuttering
stuttering
uttering