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1. Limitations due to directivity
When a loudspeaker becomes directive, radiated waves no longer propagate with spherical or quasi-spherical wavefronts. We generally observe an increasingly narrow main lobe complemented by highly directive secondary lobes (beams). The presence of these secondary lobes leads to frequency distortion, resulting in altered timbres. This lobe decomposition effect appears at lower frequencies, the larger the diameter of the loudspeaker.
1.1 Reminder of the directivity properties of a loudspeaker
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Limitations due to directivity
Limitations due to diffraction
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