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- W4253417187 abstract "A novel type of line microphone is described that utilizes a distributed input primarily for the purpose of improving signal-to-wind-noise ratio. The input to the transducer takes place through a tapered pipe that is coupled to the atmosphere by means of acoustical resistances uniformly spaced along the length of the pipe. The relationship between the resistances of the openings and the longitudinal variation in the characteristic impedance of the pipe is so adjusted as to make the system nonreflecting. Microphones of this type have been constructed for use in the frequency range below 1 cps for the purpose of detecting atomic explosions at great distances. A prototype 1980 ft long with 100 openings is described, which gives an improvement in the signal-to-noise ratio of as much as 20 db under severe wind conditions." @default.
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- W4253417187 date "1959-01-01" @default.
- W4253417187 modified "2023-09-23" @default.
- W4253417187 title "Noise-Reducing Line Microphone for Frequencies below 1 cps" @default.
- W4253417187 doi "https://doi.org/10.1121/1.1930201" @default.
- W4253417187 hasPublicationYear "1959" @default.
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