Ambisonics. Part one: General system description
- P. Fellgett
- Physics
- 1975
Ambisonics is a technology for surround-sound which aims specifically at not making four (or any other number) of loudspeakers audible as separate sources of sound. It is designed using appropriate…
On the assessment of optical images
- P. Fellgett, E. H. Linfoot
- PhysicsPhilosophical transactions of the Royal Society…
- 17 February 1955
In the formation of an optical image, each surface element of the object gives rise to a more or less blurred distribution in the image surface, of total brightness proportional to that of the object…
Thermal Regulation in Sail Lizards
- C. Bramwell, P. Fellgett
- BiologyNature
- 1 March 1973
The sail of Dimetrodon grandis was the end form of an evolutionary series of pelycosaurs that had tended to develop increasingly large sails, with features strongly suggesting an early attempt at temperature regulation.
Dynamic Impedance and Sensitivity of Radiation Thermocouples
- P. Fellgett
- Engineering
- 1 June 1949
The concept of dynamic impedance is applied to radiation thermocouples. An equivalent circuit is derived, in terms of which the working of a thermocouple and the factors leading to high sensitivity…
Concerning Photographic Grain, Signal-to-Noise Ratio, and Information
- P. Fellgett
- Geology
- 1 April 1953
The usefulness of applying such concepts as signal-to-noise ratio to the quantitative measurement of grainy photographic images has been limited by doubts as to how this ratio depended on the…
Ambisonic reproduction of directionality in surround-sound systems
- P. Fellgett
- PhysicsNature
- 1 December 1974
In both the technology and the aesthetics of extending high fidelity reproduction to surround-sound, reproduction of natural ambience is crucial. The ‘quadraphonic’ attempt to reproduce four…
The reward system
- P. Fellgett
- Psychology, BiologyNature
- 1 May 1975
The reward system is a group of neural structures that are critically involved in mediating the effects of reinforcement and serves as reinforcers in animals and humans.
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