
TechnologyMay 24, 1919
A Megaphone of Novel Design

A Megaphone of Novel Design

Acoustics of Auditoriums—II
An Investigation of the Acoustical Properties of the Auditorium of the University of Illinois

Acoustics of Auditoriums—I
An Investigation of the Acoustical Properties of the Auditorium of the University of Illinois

Wires as a Remedy for Defective Acoustics