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The clothes and presence of the people absorb the echoes sound waves.
because the minimum distance between the us (the source) and the reflector should be 16.5 cm.
I think you mean, "acoustics" as a term meaning how well sounds can be heard in a particular room or hall.
acoustics
acoustics.
Continuously repeating echoes in a room are known as reverberation.Where the echo is distinct, it is just an echo
Because Of Reflection
The clothes and presence of the people absorb the echoes sound waves.
An echo is a reflection of sound that may come from many places. Examples of echoes could be when sound bounces off the bottom of a well or a large room. There is a delay depending on distance.
I heard her exclaim "BINGO!" from the other room. I heard a women exclaim "cry or scream" from the other room.
The curtains absorb the sound waves and the waves are not bounced back so we do not get an echo.
It echoes and then bounces around the room. (Like sound does) As it is a echoey building.
It all has to do with the shape of a room. A famous example of this is a room where someone could whisper at one side of a room and be heard by someone at the other end.
because the minimum distance between the us (the source) and the reflector should be 16.5 cm.
I heard that it was in the Science Room
A room that you cannot enter...
A small meeting room or small conference room.