Handbook for Sound Engineers

172 Chapter 7 to an adequately chosen geometry and size of the surfaces involved in this reverberation-time generating mechanism ...

Acoustics for Auditoriums and Concert Halls 173 of curvature should therefore be above half the total height of the room or belo ...

174 Chapter 7 According to Fig. 7-34, this is the superelevation of the visual line (virtual line between eye and reference poin ...

Acoustics for Auditoriums and Concert Halls 175 (7-49) where, for y 0 = 0: The superelevation of the visual line should amount t ...

176 Chapter 7 w is the width of the rear wall, h is the height of the rear wall, D is the enclosure depth. Optimum conditions fo ...

Acoustics for Auditoriums and Concert Halls 177 7.3.3.3.3 Orchestra Pit On principle, the arrangement of the orchestra with musi ...

178 Chapter 7 reflection from sound sources on the stage. Convex curves (in the vertical domain) combined with a sound-absorbing ...

Acoustics for Auditoriums and Concert Halls 179 restrictive role for the possible mass of the reflectors. For spoken performance ...

180 Chapter 7 Elliptical Effect. If the sound source is located between half the radius of curvature and the full radius of curv ...

Acoustics for Auditoriums and Concert Halls 181 The measurement and calculation of the scattering coefficient under random sound ...

182 Chapter 7 (7-54) A special form of a diffusely reflecting surface can be realized by lining up phase-grating structures of v ...

Acoustics for Auditoriums and Concert Halls 183 7.3.4.4 Sound Absorbers Sound absorbers can occur in the shape of surfaces, buil ...

184 Chapter 7 cient W numerically to the sound absorption coefficient D. 7.3.4.4.1 Sound Absorption Through Porous Materials The ...

Acoustics for Auditoriums and Concert Halls 185 The clear spacing of the coffering should be, in general, smaller in every dire ...

186 Chapter 7 The resonance frequency of a Helmholtz resonator is generally calculated as (7-70) where, c is the speed of sound ...

Acoustics for Auditoriums and Concert Halls 187 located in this indifferent acoustical boundary region, so that the influence of ...

188 Chapter 7 7.4 Variation of Room Acoustics by Construction or Electroacoustic Methods 7.4.1 Variable Acoustics The manipulati ...

Acoustics for Auditoriums and Concert Halls 189 tural measures it is possible to achieve good results in this respect. Realizati ...

190 Chapter 7 frequency dependence of these elements. Slots between the installed slewable wall elements may, depending on the p ...

Acoustics for Auditoriums and Concert Halls 191 reverberation time and energy in the hall—i.e., directly influencing the acousti ...