| 摘要 |
<p>The present publication describes a method for attenuating acoustic reflections related to sound radiated by a loudspeaker (2) in an acoustic space (1). According to the method, at least one cancelling loudspeaker (3) is used for radiating a cancelling sound in said space (1). The signal required for producing the cancelling sound is sampled from the sound reproduction apparatus prior to the processing of the original sound signal for emission into said acoustic space. The sample signal is low-pass filtered, delayed, amplified and inverted prior to being taken to said cancelling loudspeaker (3). In the text is also described a sound reproduction apparatus comprising signal sampling means (7), control means (4, 5, 6) and at least one cancelling loudspeaker (3) for radiating said cancelling sound.</p> |
