Psychological tests in relation to reverberance of sound fields were conducted in an existing hall which is a medium-sized multipurpose hall with 400 seats. Music and speech as sound sources were radiated from an omnidirectional dodecahedron loudspeaker on the stage. Paired-comparison tests were applied for the sound fields changing two orthogonal factors. These factors were the subsequent reverberation time Tsub and the SPL. The Tsub were adjusted by a hybrid system involving the reverberation control room and an electroacoustic system. 21 subjects took part in this test. The results indicate that the reverberance is influenced independently on the Tsub and the SPL. The reverberance increases with increasing both the Tsub and the SPL.