The loud noise will frighten off the birds from the garden
They tried to frighten off the intruders with a dog
The smell of garlic is said to frighten off mosquitoes
His aggressive behavior was meant to frighten off potential customers
We don't want to frighten off the children with scary stories
The sudden appearance of the police helped to frighten off the vandals
The bright lights are used to frighten off nocturnal animals
She hoped her stern expression would frighten off any unwanted visitors
The farmer used scarecrows to frighten off crows from his crops
Don't try to frighten off the shy deer; just observe them quietly
That loud noise didn't frighten off the birds.
They must be very used to it then.
Or perhaps they are just very brave birds.
The loud noises might frighten off the birds
The loud noises might scare away the birds
The loud noises could deter the birds from coming