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  2. 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.

  3. Absorption (acoustics) - Wikipedia

    en.wikipedia.org/wiki/Absorption_(acoustics)

    How well a room absorbs sound is quantified by the effective absorption area of the walls, also named total absorption area. This is calculated using its dimensions and the absorption coefficients of the walls. [4] The total absorption is expressed in Sabins and is useful in, for instance, determining the reverberation time of auditoria.

  4. Reverb effect - Wikipedia

    en.wikipedia.org/wiki/Reverb_effect

    The first reverb effects, introduced in the 1930s, were created by playing recordings through loudspeakers in reverberating spaces and recording the sound. [2] The American producer Bill Putnam is credited for the first artistic use of artificial reverb in music, on the 1947 song "Peg o' My Heart" by the Harmonicats.

  5. 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 ...

  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. Critical distance - Wikipedia

    en.wikipedia.org/wiki/Critical_distance

    In a reverberant space, the sound perceived by a listener is a combination of direct and reverberant sound. The ratio of direct sound is dependent on the distance between the source and the listener, and upon the reverberation time in [the room]. At a certain distance the two will be equal. This is called the "critical distance."

  8. Is It Safe to Use Expired Vitamins? The Truth About Vitamin ...

    www.aol.com/vitamins-expire-nutritionists-weigh...

    Rather than becoming unsafe, they lose potency slowly over time.” If they’re stored in optimal conditions, you can get the most bang for your buck. Best case scenario, the average shelf-life ...

  9. Acoustical engineering - Wikipedia

    en.wikipedia.org/wiki/Acoustical_engineering

    Reverberation is the persistence of sound caused by repeated boundary reflections after the source of the sound stops. This principle is particularly important in enclosed spaces. Diffraction is the bending of sound waves around surfaces in the path of the wave.