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2. Room acoustics - Wikipedia

   en.wikipedia.org/wiki/Room_acoustics

   The most appropriate reverberation time depends on the use of the room. RT60 is a measure of reverberation time. [9] Times about 1.5 to 2 seconds are needed for opera theaters and concert halls. For broadcasting and recording studios and conference rooms, values under one second are frequently used. The recommended reverberation time is always ...

3. Speech transmission index - Wikipedia

   en.wikipedia.org/wiki/Speech_transmission_index

   Speech Transmission Index (STI) is a measure of speech transmission quality. The absolute measurement of speech intelligibility is a complex science. The STI measures some physical characteristics of a transmission channel (a room, electro-acoustic equipment, telephone line, etc.), and expresses the ability of the channel to carry across the characteristics of a speech signal.

4. Sound reduction index - Wikipedia

   en.wikipedia.org/wiki/Sound_Reduction_Index

   The Sound Reduction Index is expressed in decibels (dB). It is the weighted sound reduction index for a partition or single component only. This is a laboratory-only measurement, which uses knowledge of the relative sizes of the rooms in the test suite, and the reverberation time in the receiving room, and the known level of noise which can pass between the rooms in the suite by other routes ...

5. Reverberation - Wikipedia

   en.wikipedia.org/wiki/Reverberation

   Reverberation time is a measure of the time required for the sound to "fade away" in an enclosed area after the source of the sound has stopped. When it comes to accurately measuring reverberation time with a meter, the term T 60 [ 6 ] (an abbreviation for reverberation time 60 dB) is used.

6. File:Reverberation time diagram.svg - Wikipedia

   en.wikipedia.org/wiki/File:Reverberation_time...

   English: Very simplified diagram: sound level in a reverberant cavity excited by a pulse, as a function of time. RT60 is the reverberation time. The small variations (small vertical peaks) of the pressure along the lines are not shown.

7. Download, install, or uninstall AOL Desktop Gold - AOL Help

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   Learn how to download and install or uninstall the Desktop Gold software and if your computer meets the system requirements.

8. AOL Mail

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   Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

9. AOL Mail for Verizon Customers - AOL Help

   help.aol.com/products/aol-mail-verizon

   AOL Mail welcomes Verizon customers to our safe and delightful email experience!