Add low frequency formula for thermoelastic noise from Cerdonio
Adds low frequency formula for thermoelastic noise from 10.1103/PhysRevD.63.082003.
Also fixes a typo in the infrasound label (no change to calculation).
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Adds low frequency formula for thermoelastic noise from 10.1103/PhysRevD.63.082003.
Also fixes a typo in the infrasound label (no change to calculation).