“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/

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s