The ringing of an electric bell in an enclosed evacuated glass bell jar is not heard outside because

Q. Assertion :A bell ringing in an evacuated jar cannot be heard. Reason: Sound waves needs a medium to travel.

Q. A ringing electric bell is kept inside a glass jar and a vacuum pump is attached to it.
What will happen, if we ring the bell and gradually pump out the air inside the glass jar?

Q. A ringing bell is hung inside a vacuum chamber. Whether its sound can be heard outside?

Q. When air is completely removed from a bell jar containing a ringing bell, sound from the bell can be heard.

Q. If I put a ringing bell inside a jar and seal the jar air tight will I be able to hear the ringing of the bell from outside?