I grafici

paulberry

Posted on 6/5/2010, 11:14 by: paulberry

User deleted

by soundstage:

On-axis frequency response - Measured directly in front of the speaker face (2 or 3 meters).

Purpose: Shows the forward-firing output of the loudspeaker across the audible frequency spectrum.

What it tells you: In comparison to the 15 degree and 30 degree measurements we do, this measurement should be the flattest (la linearita' su cui insisto) and have the widest bandwidth. Bandwidth refers to the upper (highs) and lower (bass) frequencies that the loudspeaker under test will reproduce. Most good speakers today will extend easily to 20kHz and beyond, although bass performance will vary widely. Full-range is considered 20Hz to 20kHz, but only the largest loudspeakers can approach 20Hz and even some very large speakers will not be "flat" at 20Hz. Many subwoofers cannot reproduce 20Hz at the same sound pressure level as they reproduce 50Hz. One should recognize that since these measurements are performed in anechoic chamber, they will generally show less bass than what you can expect in a real room (vedi studi di Allison:incrementi in casa nei bassi daa 6 a 9 db).

Although all frequency response measurements will have some bumps, in general, good speakers will have a smooth and even response within its bandwidth without many severe dips or bumps. Dips indicated less output at that frequency while bumps indicate more. The audible result of the dips and bumps in the response curve will depend on the frequencies where they occur. A bump in the upper bass may make the speaker sound boomy. A dip in the midrange can make the speaker sound recessed

A bump in the upper bass may make the speaker sound boomy: qui si riferisce alle esaltazioni ai 100hz.
Purtroppo poi nelle prove non si mette poi in evidenza a sufficenza quanto questo sia grave ma si sorvola..

248 replies since 8/11/2007, 17:07 41151 views

e dove va l'hifi