| 摘要 |
#CMT# #/CMT# The loudspeaker (1) has a bending resistant plate (2) i.e. membrane, that is excitable by flexural vibration. Electromechanical transducers (3, 4) i.e. oscillator coils, are attached on the plate to convert electrical sound signals (9, 10) into flexural vibration. A filter device (8) is connected to the electromechanical transducers, and exhibits a transfer function (13). The plate excited by the flexural vibration radiates sound via the electromechanical transducers. A mechanical-electrical transducer (7) i.e. microphone, generates a measuring signal (11) corresponding to the sound. #CMT# : #/CMT# An independent claim is also included for a method for determining acoustic characteristics of a flat surface loudspeaker and room acoustics. #CMT#USE : #/CMT# Flat surface loudspeaker. #CMT#ADVANTAGE : #/CMT# The mechanical-electrical transducer calculates acoustic characteristics of the loudspeaker and room acoustics with reduced complexity, without the requirement of measuring microphone in the room, which is exposed to sound, thus avoiding possibilities of error resulting due to unfavorable positioning of the measuring microphone. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# The drawing shows a schematic diagram of a flat surface loudspeaker. 1 : Flat surface loudspeaker 2 : Bending resistant plate 3, 4 : Electromechanical transducers 7 : Mechanical-electrical transducer 8 : Filter device 9, 10 : Electrical sound signals 11 : Measuring signal 13 : Transfer function. |
