{"e":{"id":288549,"source":"ia_catalogofcopyri341213libr","title":"SOUND WAVES AND THEIR SOURCES","header":"URCES. Encyclopaedia Britannica Films, 1950, 11 min., sd., bew, 16mm. Summary: Shows how sounds in our environment originate in an object that vibrates, and explains the meaning of loudness, pitch, and quality. Credits: Collaborators, Physical Sciences Staff in the College, the University of Chicago","year":1950,"reels":null,"feet":null,"sound":false,"credits":null,"notes":[],"line_start":45810,"line_end":45824,"source_text":"SOUND WAVES AND THEIR SOURCES. \nEncyclopaedia Britannica Films, 1950, \n11 min., sd., bew, 16mm. \n\nSummary: Shows how sounds in our \nenvironment originate in an object that \nvibrates, and explains the meaning of \nloudness, pitch, and quality. \n\nCredits: Collaborators, Physical Sciences \nStaff in the College, the University of Chi- \ncago. \n\n© Encyclopaedia Britannica Films Inc.; \n5Oct50; MP684. ","source_meta":{"name":"Catalog of Copyright Entries, Third Series, Parts 12–13: Motion Pictures, 1950","url":"https://archive.org/details/catalogofcopyri341213libr","cite":"Internet Archive catalogofcopyri341213libr (OCR text)","file":"/root/projects/publicreel/data/raw/cce_third_series/1950_catalogofcopyri341213libr_djvu.txt"},"ia_items":[],"ia_lookup":[],"atlas":[]},"regs":[{"id":307456,"entry_id":288549,"reg_number":"MP684","series":4,"see_also":[],"reg_class":"MP","published":true,"claimant":"Encyclopaedia Britannica Films Inc","author":null,"deposit":null,"reg_date":"1950-10-05","part":null,"part_title":null,"source_line":45823,"raw":"ur environment originate in an object that vibrates, and explains the meaning of loudness, pitch, and quality. Credits: Collaborators, Physical Sciences Staff in the College, the University of Chicago © Encyclopaedia Britannica Films Inc.; 5Oct50; MP684","flags":[],"status":"no-renewal-found","pd_date":"1979-01-01","reason":"no renewal entry found for 1977-1979 in the CCE motion-picture renewal sections or in the Copyright Office renewal records 1978-2025","match_kind":null,"match_confidence":null,"title_similarity":null,"renewals":[],"window":[1977,1978],"window_volumes":[{"year":1977,"ia_identifier":"1977motionpictur3311213libr"},{"year":1978,"ia_identifier":""},{"year":1979,"ia_identifier":""}]}]}