“Bell Telephone engineer in a research room designed to eliminate 99% of all outside sound”
via http://www.retronaut.com/2013/03/bell-telephone-acoustics-lab/
“Bell Telephone engineer in a research room designed to eliminate 99% of all outside sound”
via http://www.retronaut.com/2013/03/bell-telephone-acoustics-lab/
s a m h o c h b e r g - m e t i c u l o u s l y r a n d o m i z e d 