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E14 On a simplified hybrid analog digital correlator
E16 Sound dissipation of different profile surfaces
E18 Sound reflectivities of plane panels
absorption coefficient acoustic amplitude AN/Af angle array auditorium average balloons band block calculated calibration ceiling characteristics charge decay circuit concrete constant correlation coupler decay curves delay density diaphragm diffusion dimensions direct sound distance distribution echo effect electrets electrostatic loudspeaker equation evaluation factor Fig.l floor fluorocarbon formula free field frequency modulation frequency range frequency response function hall Hallraum impedance incidence Klangfarbung laboratory linear loudspeakers mastoid maximum measured method microphone modulation noise normal obtained output panel piezoelectric plate radiation ratio recorded reflected sound reflection coefficient resonance reverberant sound reverberation chamber reverberation room sensitivity shown in Fig shows signal slots sound absorption sound field sound insulation sound intensity sound level meter sound pressure level sound reinforcement system sound source space spherical stroboscope surface tape temperature tion Tokyo transducer transmission loss values velocity voltage wall wave