16-mm sound motion pictures : a manual for the professional and the amateur (1953)

Record Details:

Title:
16-mm sound motion pictures : a manual for the professional and the amateur
Date:
1953
Publisher:
New York : Interscience Publishers
Volume:
16-mm sound motion pictures : a manual for the professional and the amateur
Leaf #:
000577
Language:
English
Subjects:
Motion Pictures, Motion Picture Technology
Collection:
Books
Format:
Books
Contributor:
Niles Essanay Silent Film Museum
Sponsor:
Media History Digital Library
Coordinator:
Media History Digital Library
Description:
Date Added:
April 11, 2024
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APPENDIX E DECIBELS GAIN OR LOSS VS. VOLTAGE AND CURRENT RATIO AND POWER RATIO* Decibelsb Power ratiob Voltage and current ratiob Decibels Power ratio Voltage and current ratio 0.1 1.0233 1.0116 13.0 19.953 4.4668 0.2 1.0471 1.0233 14.0 25.119 5.0119 0.3 1.0715 1.0351 15.0 31.623 5.6234 0.4 1.0965 1.0471 16.0 39.811 6.3096 0.5 1.1220 1.0593 17.0 50.119 7.0795 0.6 1.1482 1.0715 18.0 63.096 7.9433 0.7 1.1749 1.0839 19.0 79.433 8.9125 0.8 1.2023 1.0965 20.0 100.00 10.0000 0.9 1.0 1.2303 1.2589 1.1092 1.1220 22.0 24.0 158.49 251.19 12.589 15.849 1.2 1.3183 1.1482 26.0 398.11 19.953 1.4 1.3804 1.1749 28.0 630.96 25.119 1.6 1.4454 1.2023 30.0 1000.0 31.623 1.8 2.0 2.2 2.4 2.6 2.8 1.5136 1.5849 1.6595 1.7378 1.8197 1.9055 1.2303 1.2589 1.2882 1.3183 1.3490 1.3804 32.0 34.0 36.0 38.0 40.0 1584.9 2511.9 3981.1 6309.6 10* 39.811 50.119 63.096 79.433 100.000 3.0 3.5 4.0 4.5 5.0 5.5 1.9953 2.2387 2.5119 2.8184 3.1623 3.5481 1.4125 1.4962 1.5849 1.6788 1.7783 1.8836 42.0 44.0 46.0 48.0 50.0 10* X 1.5849 10* x 2.5119 10* x 3.9811 10* x 6.3096 105 125.89 158.49 199.53 251.19 316.23 6.0 3.9811 1.9953 52.0 105x 1.5849 398.11 7.0 5.0119 2.2387 54.0 105x 2.5119 501.19 8.0 6.3096 2.5119 56.0 105x 3.9811 630.96 9.0 7.9433 2.8184 58.0 103x 6.3096 794.33 10.0 10.0000 3.1623 60.0 106 1,000.00 11.0 12.0 12.589 15.849 3.5481 3.9811 70.0 80.0 90.0 107 10s 109 3,162.3 10,000.0 31,623 100.0 ]010 100,000 a To convert Decibels to nepers multiply by 0.1151 Nepers to decibels multiply by 8.686 Where the power ratio is less than unity, invert the fraction and express the result as a decibel loss. T\ L T\ b Db = 20 x log10 — = 20 log10 T = 10 log10 — Va ?, 561