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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
metallic
knife
footsteps
heartbeat
thunder
explosion
sand
footstep
sliding
sniper
countryside
waterfall
moving
pistol
concrete
melee
three
grenade
weapon
cicadas
break
attack
glass
sink
blood
sharpen
slide
knock
metal
wood
running
fire
underwater
shotgun
unlock
knocking
heart
sharp
ceramic
water
bell
helicopter
splat
loop
trigger
shot
rain
smoke
laser
bullet
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