Wallace Sabine was an American physicist and one of the pioneers in the field of architectural acoustics. He is known for developing the concept of “reverberation time,” which is the time it takes for sound to decay by 60 dB in a closed space after the sound source has stopped. Sabine’s work laid the foundation for understanding the acoustical properties of rooms and designing spaces with optimal sound quality. His research led to improvements in concert halls, auditoriums, and other spaces where acoustics play a crucial role.