A1 - Meissner, Mirosław
PB - Committee on Acoustics PAS, PAS Institute of Fundamental Technological Research, Polish Acoustical Society
N2 - A new method for determining optimum dimension ratios for small rectangular rooms has been presented.
In a theoretical model, an exact description of the room impulse response was used. Based on the
impulse response, a frequency response of a room was calculated to find changes in the sound pressure
level over the frequency range 20–200 Hz. These changes depend on the source and receiver positions,
thus, a new metric equivalent to an average frequency response was introduced to quantify the overall
sound pressure variation within the room for a selected source position. A numerical procedure was employed
to seek a minimum value of the deviation of the sound pressure level response from a smooth fitted
response determined by the quadratic polynomial regression. The most smooth frequency responses were
obtained when the source was located at one of the eight corners of a room. Thus, to find the best possible
dimension ratios, in the numerical procedure the optimal source position was assumed. Calculation
results have shown that optimum dimension ratios depend on the room volume and the sound damping
inside a room, and for small and medium volumes these ratios are roughly 1 : 1.48 : 2.12, 1 : 1.4 : 1.89 and
1 : 1.2 : 1.45. When the room volume was suitably large, the ratio 1 : 1.2 : 1.44 was found to be the best
one.
KW - room acoustics
KW - small rooms
KW - optimum dimension ratios
KW - room impulse response
KW - frequency room response
T1 - A Novel Method for Determining Optimum Dimension Ratios for Small Rectangular Rooms