Letter | Published:

The Bottle-Pipe Resonator

Nature volume 128, page 270 (15 August 1931) | Download Citation



In the issue of NATURE of Aug. 30, 1924 (p. 309), Aldis gave a formula for a resonator consisting of a closed cylindrical pipe of large diameter (length L) connected to an open cylindrical pipe of smaller diameter (length l) which he termed a ‘bottle-pipe’, namely, tan (2πl/λ).tan(2πL/λ) = Sα/SD where Sα and SD, are the sectional areas of the smaller and larger pipes respectively and λ is the wave-length of the natural frequency. The accuracy of the formula was questioned in a later number.

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  1. The Northern Polytechnic, Holloway, London, N.7, July 10.

    • A. E. BATE


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