초록 ▼

An electro-acoustic arrangement comprises an amplifier (4) having a first input terminal (5), a second input terminal (5′), a first output terminal (3), a second output terminal (3′), and a series arrangement of a first impedance (1) and an electro-acoustic transducer unit (2) is coupled to the outp

An electro-acoustic arrangement comprises an amplifier (4) having a first input terminal (5), a second input terminal (5′), a first output terminal (3), a second output terminal (3′), and a series arrangement of a first impedance (1) and an electro-acoustic transducer unit (2) is coupled to the output terminals (3, 3′). At least the first impedance (1) is also coupled to the input terminals (5, 5′) of the amplifier. The gain factor (A) of the amplifier for a signal applied to the first and second input terminals (5) and/or the impedance value Z1 of the first impedance may be variable. This arrangement influences the acoustic properties of a space, such as the reverberation time. By means of such an arrangement (FIG. 1) and in particular by means of a system (FIG. 9) comprising a plurality of such arrangements, the acoustic properties of a space, such as the reverberation time, can be influenced.

대표청구항 ▼

An electro-acoustic apparatus comprising: an audio amplifier having first and second signal input terminals and first and second signal output terminals, an electro-acoustic transducer unit which, in normal operation of the electro-acoustic apparatus, operates as both a loudspeaker and a microphone

An electro-acoustic apparatus comprising: an audio amplifier having first and second signal input terminals and first and second signal output terminals, an electro-acoustic transducer unit which, in normal operation of the electro-acoustic apparatus, operates as both a loudspeaker and a microphone for the electro-acoustic apparatus, a first impedance, means connecting the first impedance and the transducer unit in series circuit to said first and second amplifier output terminals, and means coupling said amplifier first and second input terminals across said first impedance so that a signal developed across said first impedance serves as the sole input to said amplifier whereby the electro-acoustic apparatus can alter at least one acoustic property of a space as a function of the amplifier gain and/or the impedance value of said first impedance.