Talk:Sound transmission class

	Engineering portal This article is within the scope of WikiProject Engineering, a collaborative effort to improve the coverage of engineering on Wikipedia. If you would like to participate, please visit the project page, where you can join the discussion and see a list of open tasks.EngineeringWikipedia:WikiProject EngineeringTemplate:WikiProject EngineeringEngineering articles
???	This article has not yet received a rating on the project's importance scale.

‹See TfM›

Physics: Acoustics Low‑importance

	Physics portal This article is within the scope of WikiProject Physics, a collaborative effort to improve the coverage of Physics on Wikipedia. If you would like to participate, please visit the project page, where you can join the discussion and see a list of open tasks.PhysicsWikipedia:WikiProject PhysicsTemplate:WikiProject Physicsphysics articles
Low	This article has been rated as Low-importance on the project's importance scale.
	This article is supported by Acoustics Taskforce.

Professional sound production C‑class Mid‑importance

	This article is within the scope of WikiProject Professional sound production, a collaborative effort to improve the coverage of sound recording and reproduction on Wikipedia. If you would like to participate, please visit the project page, where you can join the discussion and see a list of open tasks.Professional sound productionWikipedia:WikiProject Professional sound productionTemplate:WikiProject Professional sound productionProfessional sound production articles
C	This article has been given a rating which conflicts with the project-independent quality rating in the banner shell. Please resolve this conflict if possible.
Mid	This article has been rated as Mid-importance on the project's importance scale.

Question

The "what can be heard" from STC values is inaccurate. For example, loud speech is definitely audible through STC 45 construction. Complaints are likely from residents in condos built to meet STC 45.

Epwolfram (talk) 23:09, 21 February 2011 (UTC)[reply]

Question

what is Noise reduction class —The preceding unsigned comment was added by 203.90.100.74 (talk • contribs) 04:43, December 30, 2005 (UTC)

The article states that STC ratings before 1999 would be unreliable, however the chart of values was taken from a book published in 1994. —Preceding unsigned comment added by 204.128.192.3 (talk) 20:58, 30 September 2009 (UTC)[reply]

Merge outdoor-indoor transmission class here?

Outdoor-indoor transmission class is a very short, and also confusing article. If I understand correctly it is a sound transmittion class, that maybe can be covered in this article instead to get it explained in context. // habj 21:16, 14 February 2007 (UTC)[reply]

sounds like a good Idea to me

Anruari 14:24, 8 October 2007 (UTC)[reply]

Sound transmission class does not make it crystal clear than 1B corresponds to a factor of 10 instead of (for example) 2. It also says that a 1B difference ``corresponds to the human ear of a factor of two, which muddies the issue. Say ``logarithmic does not help completely, since (for example) some computer scientists describe algorithm lengths in terms of base-two logarithms.

Perhaps change

 ``The dB scale is a logarithmic one and the human ear perceives a 10dB reduction in sound

as roughly halving the volume - a 40 dB noise subjectively seems half as loud as a 50 dB one.

 to
 ``The dB scale is a logarithmic one, with a 1B difference corresponding to a factor of 10

in sound energy. The human ear...

Julyx (talk) 00:15, 17 July 2008 (UTC)[reply]

sound damping techniques

This is complete bull shit. There's no way adding fiberglass batts only adds 3 db or so to the STC but doubling the sheetrock along with insulation brings it to "up to 45" meaning that the sheetrock accounted for more than -3 db/more than the insulation batts. This article is about as reliable as a contractor with out of state plates. Daniel Christensen (talk) 23:08, 30 October 2010 (UTC)[reply]

Sorry Daniel you dont know what you are talking about. I work in this area. For a standard in-house wall as described adding some mineral wool into the cavity with no other changes will only provide a small increase in sound insulation. Ditto with simply overbaording the wall with more drywall.

If you want to see evidence for this look at the sales literature from the manufacturers of Draywall boards. I cant be bothered to seek out the American literature. I dont work in the USA and they use STC based on their own standards, where the rest of the world uses the ISO series of standards, therefore use Rw (SRI) or it's site based equivalents.

The British Gypsum data is clearly available in their "White Book" which is available online. here

It can be seen that there are differences by between 3 - 6 dB obtained by introducing "Isowool" into a wall with otherwise identical boards and studs.

To gain large improvements in sound insulation the independent stud systems Here or Here can be employed to obtain very large improvements in sound insulation.

Anruari (talk) 15:45, 23 August 2012 (UTC)[reply]

A Commons file used on this page has been nominated for deletion

The following Wikimedia Commons file used on this page has been nominated for deletion:

What-is-sound-transmission-class.jpg

Participate in the deletion discussion at the nomination page. —Community Tech bot (talk) 03:07, 21 October 2018 (UTC)[reply]

Phrase "heard but not audible"

In the STCs by audio distinguishability table, the phrase "heard but not audible" is redundant as the dictionary definition of audible is "able to be heard." This makes me doubt the quality of the information in the table and whether or not it should be removed. Mustardman24 (talk) 00:28, 31 August 2023 (UTC)[reply]

Update to broken link

Link 36 did not work for me but it seems the article is now at [1]https://www.insul.co.nz/media/21198/1412hora.pdf Cullenfluffyjennings (talk) 15:08, 23 September 2024 (UTC)[reply]