01-06-2017, 12:05 AM
Bonsoir,
Bon finalement j'ai trouvé la réponse à ma question , au hasard d'une lecture, je cite :
"If the enclosure's two vents are the same diameter, but different lengths, the shorter vent (higher tuned) will operate as planned, and then when you get below it's tuning, it will unload the box and driver, and the longer vent will never come into play. It all goes back to the basics of a Hemholtz Resonator: One enclosure volume, one vent tuning, one resonant frequency. OK, you can have two or more vents in an enclosure, but they have to be tuned so they all resonate as one vent. You could locate two vents so one had a longer wave/signal transit time, but then I think you're into tapped horn territory. I've thought about this before (I bet a lot of people have), and I think two-vent designs with unequal tunings will always require an enclosure for each vent, and by definition you then have a 6th order box."
Bon finalement j'ai trouvé la réponse à ma question , au hasard d'une lecture, je cite :
"If the enclosure's two vents are the same diameter, but different lengths, the shorter vent (higher tuned) will operate as planned, and then when you get below it's tuning, it will unload the box and driver, and the longer vent will never come into play. It all goes back to the basics of a Hemholtz Resonator: One enclosure volume, one vent tuning, one resonant frequency. OK, you can have two or more vents in an enclosure, but they have to be tuned so they all resonate as one vent. You could locate two vents so one had a longer wave/signal transit time, but then I think you're into tapped horn territory. I've thought about this before (I bet a lot of people have), and I think two-vent designs with unequal tunings will always require an enclosure for each vent, and by definition you then have a 6th order box."