The music echoed in the valley.

He entered the building through the revolving door.

The door opens.

I can hear the sound of a bell.

The sound of the church bell was echoing far away.

I heard the sound of the church bell.

When he opened the window, fresh air flowed into the room.

When he opened the window, fresh air flowed into the room.

He opened the Western-style door.

This audio is very clear.