a timpani drummer raises both mallets high above massive kettle drums. The drummer strikes the drums with full force, creating visible sound waves radiating outward. The powerful drumbeat reverberates throughout the concert hall as the sound continues to echo. The waves bounce off the ornate ceiling and walls, amplifying the thunderous noise. Audience members in the front rows cover their ears while leaning back in their seats. Musicians nearby pause their playing as the drum's boom overwhelms all other sounds. sound that is very loud and continuing for a long time