Passive frequency stabilization in an acoustic resonator

Details Passive frequency stabilization in an acoustic resonator Passive frequency stabilization in an acoustic resonator

1997-11-10

1999-01-12

Doerrler, William

Refrigeration

Gas compression, heat regeneration and expansion, e.g.,...

62467, F25B 900

Patent

active

058573402

ABSTRACT:
The resonance frequency of a gas-filled acoustic resonator (12) is stabilized against changes in frequency due to changes in the temperature of the gas and resonator (12) by placing a gas mixture and an adsorbent (16) within the resonator (12). If the temperature dependence of the adsorbency is different for the different species comprising the gas mixture, then it is shown that the proper amount of adsorbent (16) can maintain the acoustic resonant frequency of the gas mixture within resonator (12) very nearly equal to a constant frequency.

REFERENCES:
patent: 5647216 (1997-07-01), Garrett
patent: 5673561 (1997-10-01), Moss

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