那些用來調聲的配件真的有用嗎 ?

[carsound]

定義了音調的平衡度、音場、定位、線性等的聆聽標準?

它的定義內容為何呢?

你可以自行前往IASCA網站加入會員，就可以下載其競賽規則書。

下面就是節錄音場的說明
8.2 - SOUND STAGE
A Sound Stage is the platform where the musical source originates from; it can be
quite large (orchestras) or quite small (room in a jazz club). The goal is to reproduce
that sound stage as accurately and realistically as possible so that it seems to
exceed the physical boundaries of the vehicle interior.
A sound stage is broken down into five factors:
 Listening Position - The position of the sound stage relative to the listener
and the apparent distance of the sound stage from the listener.
 Stage Width - How wide the stage is from its furthest point to the left to its
furthest point to the right
 Stage Height - How tall the stage is from the floor of the stage to its highest
point
 Stage Depth - How deep the stage is from its furthest point forward to its
furthest point back
 Ambience - The sense of space naturally created by the music and the size of
the stage
In Sound Stage judging, the Judge will evaluate how well the vehicle‘s sound system
is able to recreate the sound stage and ambient content of the source material being
played. The ideal car audio system sound stage will create the illusion that the sound
is originating in front of the listener, with additional ambient content. While evaluating
Sound Stage, the Judge will draw maps describing the sound stage boundaries for
each seat. These maps will not only help in evaluating the sound stage elements,
but will be vital to the evaluation of imaging.
The Judge will not let any visual cues (apparent speaker locations or lack of them,
for instance) influence their judgment. Sound Quality Judges have been trained to be
―blind‖ to any equipment in the vehicle or any distractions that interfere with their
ability to properly determine the sound stage.
Tonal Accuracy Scoring Scale
Perfect 20 points
Exceptional 16 - 19 points
Very Good 12 - 15 points
Good 8 - 11 points
Marginal 2 - 7 points
Needs Improvement 1 point
NO Zero Scores are Given
34
LISTENING POSITION 1 to 15 points
The best systems will give the illusion of the stage being well in front of the listener,
exceeding the front boundary of the vehicle. This is considered ideal as it
approximates the experience of listening to a live concert.
The Judge will base scoring on the distance between themselves and the perceived
front boundary of the sound stage.
Listen carefully to the bass. Does it seem to come from up front or from behind?
Maximum points within each scoring tier will only be given to systems that
convincingly create the illusion that all the sound originates from the specified
location.
Some systems will exhibit some localization of sub bass towards the rear, but still
maintain a forward listening position. Judges should not drop these vehicles to the
―behind the listening position‖ scoring tier.
In this situation, a Judge should deduct 2 points for obvious rear-bass within the
scoring tier established by the higher frequencies (mid-bass and up) and make note
of that action on the score sheet. In no case should a vehicle be dropped to a lower
tier for rear sub bass only.
These are general guidelines for scoring. Keep in mind that if a vehicle exhibits
different characteristics for each seat in two seat judging, the Judges are instructed
to arrive at a score for each seat and then average them to arrive at a final score.