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- Director
- A E C Hopkins
- Subject
- Physics
- Distribution
- Film (16mm)
Animated diagrams show how intelligence is impressed on a carrier wave to form modulation. Explains vectors, amplitude phase and frequency modulation.*
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- Subject
- Physics
- Distribution
- Film (16mm)
Frequency, pitch and amplitude in speech and music shown by specialised techniques with cathode ray oscillograph and associated equipment. Compares harmonic content of sounds from different instruments.
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- Subject
- Medical sciences
- Distribution
- Film (16mm)
The increasing frequency of respiratory aspergillosis, experimental studies, progress in laboratory diagnosis, and the efficiency of new therapies are reported. Attempts to outline the different aspects of...
DVD Find 
Other 
Record only
-
- Subject
- Medical sciences
- Distribution
- OUT OF DISTRIBUTION, Audiocassette. 60 min.
Sound intensity, loudness, frequency, pitch, decibel notation, audibility curves, conduction and nerve deafness, discrimination.
DVD Find Other Record only
-
- Subject
- Physics
- Distribution
- Sale, VHS (PAL, 32 minutes), £35.00
Explains the photoelectric effect and tells the story of its discovery, investigation and eventual explanation by Einstein, which brought about the revolutionary notion that light is a stream of photons, and...
-
- Subject
- Physics
- Distribution
- Sale, Videocassette. VHS. b&w. 7 min., 1996 sale: £20.00 (+VAT +p&p)
Harmonic oscillations, wave propagation, sine wave, frequency, wavelength, wave speed, period of oscillation, running wave, standing wave, plane wave, spherical wave, transversal wave, longitudinal wave,...
-
- Subject
- Media studies
- Distribution
- Sale, DVD (Region 2 PAL, 26 minutes), £49.00 (DVD), £20.00 (1 Year Digital Licence), £49.00 (3 Year Digital Licence)
Some fundamental questions about advertising are answered by people who work in the industry. Topics include: the definition and purpose of advertising; who makes ads and who are they aimed at; how...
-
- Director
- Ian Kelso
- Producer
- Ian Kelso
- Subject
- Medical sciences
- Distribution
- Sale (Univ Southampton), Videocassette. Standard formats. col. 20 min.
An introduction to the principles of sound, hearing and frequency. Gives examples of the stages of children’s hearing and speech development from age six weeks to five years. The hearing tests are...
-
- Subject
- Physics
- Distribution
- Sale, Videocassette. VHS. col. 25 min., 1998 sale: £29.50 (+VAT +p&p)
Discusses the mechanisms, characteristics and behaviour of (non-light) waves travelling through matter. Examines: transverse waves, tension waves (ripples, gravity waves, longitudinal or push waves, shear...
-
- Subject
- Medical sciences
- Distribution
- Sale, Videocassette. VHS. col. 52 min., 1995 sale: £59.00 (+VAT)
1 (13 min): Introduces indigestion and defines gastro-oesophageal reflux. Outlines anatomy and functions of the digestive system. Descibes symptoms of gastro-oesophageal reflux and shows diagnosis. Explains...
Learning on Screen
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