Sabin (unit) on:
[Wikipedia]
[Google]
[Amazon]
In acoustics, the sabin (or more precisely the square foot sabin) is a unit of sound absorption, used for expressing the total effective absorption for the interior of a room. Sound absorption can be expressed in terms of the percentage of energy absorbed compared with the percentage reflected. It can also be expressed as a coefficient, with a value of 1.00 representing a material which absorbs 100% of the energy, and a value of 0.00 meaning all the sound is reflected.
The concept of a unit for absorption was first suggested by American physicist Wallace Clement Sabine, the founder of the field of architectural acoustics. He defined the "open-window unit" as the absorption of of open window. The unit was renamed the ''sabin'' after Sabine, and it is now defined as "the absorption due to unit area of a totally absorbent surface".
Sabins may be calculated with either imperial or metric units. One square foot of 100% absorbing material has a value of one imperial sabin, and 1 square metre of 100% absorbing material has a value of one metric sabin.
The total absorption in metric sabins for a room containing many types of surface is given by
where are the areas of the surfaces in the room (in m2), and are the absorption coefficients of the surfaces.
Sabins are used in calculating the reverberation time of concert halls, lecture theatres, and recording studios.
Understanding sabins
from NetWell Noise Control Units of measurement Sound measurements
In acoustics, the sabin (or more precisely the square foot sabin) is a unit of sound absorption, used for expressing the total effective absorption for the interior of a room. Sound absorption can be expressed in terms of the percentage of energy absorbed compared with the percentage reflected. It can also be expressed as a coefficient, with a value of 1.00 representing a material which absorbs 100% of the energy, and a value of 0.00 meaning all the sound is reflected.
The concept of a unit for absorption was first suggested by American physicist Wallace Clement Sabine, the founder of the field of architectural acoustics. He defined the "open-window unit" as the absorption of of open window. The unit was renamed the ''sabin'' after Sabine, and it is now defined as "the absorption due to unit area of a totally absorbent surface".
Sabins may be calculated with either imperial or metric units. One square foot of 100% absorbing material has a value of one imperial sabin, and 1 square metre of 100% absorbing material has a value of one metric sabin.
The total absorption in metric sabins for a room containing many types of surface is given by
where are the areas of the surfaces in the room (in m2), and are the absorption coefficients of the surfaces.
Sabins are used in calculating the reverberation time of concert halls, lecture theatres, and recording studios.
References
Sources
* * {{cite book , last1=Moore , first1=John Edwin , title=Design for Good Acoustics and Noise Control , date=1979 , publisher=Macmillan , location=London , isbn=978-03332-4-293-3 , url=https://books.google.com/books?id=RD5dDwAAQBAJExternal links
Understanding sabins
from NetWell Noise Control Units of measurement Sound measurements