Sound Recording And Reproduction (1941)

Describes how sound is converted into light rays to produce sound motion pictures and how the light rays are converted back into sound waves. Shows sound recording by both variable area and variable density. Features footage of James A. Brill, the narrator of many ERPI and early Encyclopedia Britannica films. To help with the A/V Geeks mission to share these forgotten films unearthed in their archive, this film and hundreds of others can be purchased on DVD (http://www.avgeeks.com/wp2/all-av-geeks-dvds/). Higher quality versions of this film can also be licensed for stock footage. Contact footage@avgeeks.com for more information.