Vacuum-isolation vessel and method for measurement of thermal no

Details Vacuum-isolation vessel and method for measurement of thermal no Vacuum-isolation vessel and method for measurement of thermal no

1991-10-07

1992-09-15

Yasich, Daniel M.

Thermal measuring and testing

Temperature measurement

By electrical or magnetic heat sensor

73 1H, 73571, G01K 730

Patent

active

051467801

ABSTRACT:
A vacuum-isolation vessel for measurement of thermal noise in microphones s an outer vessel and an inner vessel suspended within the outer vessel. A high vacuum is created between the inner and outer vessels to provide acoustical isolation. The suspension assembly coupled between the inner and outer vessels provides a substantially vibration-free environment. Thus, thermal noise in a microphone mounted within the inner vessel is accurately measured, especially at low thermal noise levels and at low frequencies.

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