The acoustic effect of cryogenically treating trumpets is investigated. Ten Vincent Bach Stradivarious B trumpets are studied, half of which have been cryogenically treated. The trumpets were played by 6 players of varying proficiency, with sound samples being recorded direct to disc at a sampling rate of 44.1 kHz. Both the steady-state and initial transient portions of the audio samples are analyzed. In some cases, a slight shift of power in the harmonic spectrum toward the higher frequencies

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... s observed in the treated trumpets. However, no statistically independent results are seen, and the most pronounced results were not repeatable. Differences observed in player-to-player and trumpet-to-trumpet comparisons overshadow any differences that may have been brought on due to the cryogenic treatment. All data was collected in a double blind fashion. The treatment itself is a three step process, involving an 8 hour linear cool down period, a 10 hour period of sustained exposure to -195 • C (-300 • F), and a 20-25 hour period of warming back to room temperature.