The loud speaker of narrow directivity and the audio playback system which possesses with the loud speaker of wide directivity

摘要

Loud speaker it possesses the constitution of 1 of the 1st type which combined the audio reproducing arrangement, with the loud speaker 7 of one which has the directivity of 2nd extent 2nd type at least, has the directivity of 1st extent or 5. In order to form the hypothetical sound source in the distance of the desire for the position LP of the observer, directivity of the said 2nd extent is considerably larger than directivity of the said 1st extent.