With this kind of carafe (for one liter of wine) I think the mathematical ratio with the volume/ straw is optimal...It seems that they affect sound in a way more than positive...
https://crystaljulia.com/9276-tm_thickbox_default/crystal-wine-decanter.jpg
https://crystaljulia.com/9276-tm_thickbox_default/crystal-wine-decanter.jpg