BRUNGARDT, A. O. - Reverberation and the Organ an Inquiry Into the Effects of Architectural Practices on Organ Pipes

Brattleboro, VT: Estey Organ Corporation, 1940. 1st Edition; 1st Printing. Stapled wraps. Charts; This is a trade sized booklet with cardstock covers and a stapled spine. The booklet is in Very Good condition and was issued without a dust jacket. There is some light bumping and wear to the corners and spine end of the book covers. The text pages are clean and bright. There is a previous owner's bookplate on the front inside cover (LeRoy V. Brandt) . "Reverberation (also known as reverb) , in acoustics, is a persistence of sound after it is produced. Reverberation is created when a sound or signal is reflected. This causes numerous reflections to build up and then decay as the sound is absorbed by the surfaces of objects in the space – which could include furniture, people, and air. This is most noticeable when the sound source stops but the reflections continue, their amplitude decreasing, until zero is reached. Reverberation is frequency dependent: the length of the decay, or reverberation time, receives special consideration in the architectural design of spaces which need to have specific reverberation times to achieve optimum performance for their intended activity. In comparison to a distinct echo, that is detectable at a minimum of 50 to 100 ms after the previous sound, reverberation is the occurrence of reflections that arrive in a sequence of less than approximately 50 ms. As time passes, the amplitude of the reflections gradually reduces to non-noticeable levels. Reverberation is not limited to indoor spaces as it exists in forests and other outdoor environments where reflection exists. " (from Wikipedia). Very Good .

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