The Milwaukee Brewers opened the series with a 2-1 win over the Los Angeles Dodgers in Game 1 on Oct. 11, before a sellout crowd of 42,617 at American Family Field.
The crowd's noise peaked at 114.2 decibels on the final out, when Mitchell caught a fly ball from Betts.
The go-ahead single by Lara registered 106.6 decibels. The crowd rarely dropped below 85 decibels, compared with a typical ambient level of 75 to 80 decibels during the NLDS.
Milwaukee also won Game 2 and now leads the series 2-0.