Complex sentence: An echea or "sounding vase" is a pot, chamber or vessel, similar in function to a modern day bass trap, originally used in ancient Greek theatres to enhance the voices of performers by resonance.
Split into simpler sentences: An echea or "sounding vase" is a pot, chamber or vessel, similar in function to a modern day bass traps. They were originally used in ancient Greek theatres to enhance the voices of performers by resonance.