Meet Me Inside the Acoustic Guitar: STC ratings

September 8, 2013

The following list gives a rough idea of what the various STC ratings mean*:

25—normal speech easily understood
30—normal speech audible, but unintelligible
35—loud speech understood
40—loud speech audible, but unintelligible
45—loud speech barely audible
50—shouting barely audible
55—shouting inaudible

* For more, see U.S. Department of Commerce National Bureau of Standards’ Handbook 119, Quieting: A Practical Guide to Noise Control, written by Raymond Berendt et al (1976).

To read the full article, click here[1].

Endnotes:
  1. here: http://www.constructionspecifier.com/masterformat/meet-me-inside-the-acoustic-guitar-music-city-centers-mile-of-operable-partitions/

Source URL: https://www.constructionspecifier.com/meet-me-inside-the-acoustic-guitar-stc-ratings/