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SFXLibrary is a database of free sound effects to use in your projects. Every sound is available in MP3, WAV and OGG format.
knock/category/helicopter sounds
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knock/category/helicopter sounds
water
underwater
thunder
rain
three
sand
splat
unlock
cicadas
wood
trigger
grenade
helicopter
slide
knock
sharp
metal
loop
knife
break
sliding
weapon
smoke
laser
bell
blood
sniper
footsteps
sink
fire
ceramic
explosion
shot
countryside
bullet
waterfall
footstep
heartbeat
shotgun
heart
metallic
attack
glass
sharpen
pistol
melee
concrete
knocking
running
moving
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