Talk:Anechoic tile

This article is in Surveillence category. Does it really have anything todo with surveillance? Seems more about stealth stuff...

The stuff about decibels seems inaccurate. A 10 dB decrease is a 50% decrease in volume, and 20 dB is 75% decrease. but i don't want to change it since i don't know for sure. —Preceding unsigned comment added by 74.66.246.43 (talk) 23:32, 16 February 2009 (UTC)

You're wrong : 10dB decrease between power P1 and P2 means 10log(P1/P2)=10, that's to say P1/P2=10, which corresponds to a reduction to 10% of initial power. Similarly, 20dB decrease means 10log(P1/P2)=20, i.e. P1/P2=100, then a reduction to 1%. -- added by isambert - at - crans - dot - org ; 23/02/2009

San Juan not the first US boat to get tiles

With all due respect to Stan Zimmerman, USS Batfish (SSN-681) received the tiles (called SHT or special hull treatment) during a non-refueling overhaul between March 1 and 1979-June 6, 1980 well before the Zimmerman's stated date for the San Juan of mid-80's. Compare http://navsource.org/archives/08/pdf/0868109.pdf (p.3 of 26) with http://www.mesothelioma.com/asbestos-exposure/jobsites/ships/submarines/uss-batfish-ssn-681.htm. --CEMSguy (talk) 07:39, 19 January 2014 (UTC)

External links modified

Hello fellow Wikipedians,

I have just modified 2 external links on Anechoic tile. Please take a moment to review my edit. If you have any questions, or need the bot to ignore the links, or the page altogether, please visit this simple FaQ for additional information. I made the following changes:

• Added archive https://web.archive.org/web/20120614065012/http://www.uboatarchive.net/U-135INT.htm to http://www.uboatarchive.net/U-135INT.htm
• Added archive https://web.archive.org/web/20110719121022/http://www.thedockyard.co.uk/documents/1/ZZ_1163759628_Nuclear%20Submarine%20Refitting%201970-1983%20Continued.pdf to http://www.thedockyard.co.uk/documents/1/ZZ_1163759628_Nuclear%20Submarine%20Refitting%201970-1983%20Continued.pdf

When you have finished reviewing my changes, you may follow the instructions on the template below to fix any issues with the URLs.

This message was posted before February 2018. After February 2018, "External links modified" talk page sections are no longer generated or monitored by InternetArchiveBot. No special action is required regarding these talk page notices, other than regular verification using the archive tool instructions below. Editors have permission to delete these "External links modified" talk page sections if they want to de-clutter talk pages, but see the RfC before doing mass systematic removals. This message is updated dynamically through the template {{source check}} (last update: 18 January 2022).

• If you have discovered URLs which were erroneously considered dead by the bot, you can report them with this tool.
• If you found an error with any archives or the URLs themselves, you can fix them with this tool.

Cheers.—InternetArchiveBot (Report bug) 20:47, 5 July 2017 (UTC)