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Aufstellungstipps
akustisch
Acoustic set-up reference
根据声响摆放
- 14 -
“Tiefe Töne brauchen Raum" - diese gängige und für
Subwoofer lebenswichtige Feststellung ist vieldeutig.
Für die Praxis nützlicher sind folgende Tatsachen:
Die mit nahezu vollem Pegel nutzbare
Grenzfrequenz des ELAC Subwoofers liegt bei unter
30Hz, je nach Gerät. Das entspricht schon
Schallschwingungen mit einer Wellenlänge von etwa
10 Metern. Trotzdem kann Tiefbass auch in kleinen
Räumen gehört werden (Extrem-Beispiel: Kopfhörer).
Es sind aber einige Besonderheiten zu beachten: in
einem geschlossenen, kastenförmigen Raum mit
weniger als 7 - 8 m Länge sollte sich der bevorzugte
Hörplatz nicht genau in der Mitte befinden. Wie in
einer Badewanne "schwappt" die Energie zwischen
den Enden hin und her und baut vor allem dort den
(Wechsel-)Druck auf (bis zum Überlaufen), genau in
der Mitte dazwischen liegt jedoch ein Druck-
Minimum, d.h. kein (Tief-)Bass. Die folgende Tabelle
gibt die Frequenz an, bei der dieser Effekt am
stärksten auftritt.
"Low frequencies need space" -- although this is a vital
concept for subwoofers, but it is also ambiguous. For
practical purposes the following facts may be more
useful:
The low frequency limit of the ELAC subwoofer at near-
maximum levels is below 30Hz, depending on the
appliance. This corresponds to a sound wave with a
length of about 10 m. In spite of this, low bass can also
be heard in small rooms (extreme example:
headphones). However, but some peculiarities should be
taken into account:
In a closed, box-shaped room with less than 7 - 8 m in
length, the optimum listening position should not be
located exactly in the middle. Like waves in a bathtub,
the energy "rolls" back and forth between both ends and
the alternating pressure build-up is focussed at these
ends until overflows. The lowest pressure remains
exactly in the middle, i. e. no (low) bass. The following
table shows the frequency at which this effect is
strongest.
“低音调需要空间”-这个常
用的以及对于低音音箱使用寿
命有重要意义的规则具有多重
含义。实际当中应该采取下列
事实更为有利:
ELAC低音音箱带有完整电平
的可用界限频率在30Hz以下
。这与波长安街0米左右的声
幅相符合。尽管如此在很小的
空间内也可听到超低音(特例
:耳机)。但要注意几种特殊
情况:
在一个不足78米长的封闭
箱式房间内最佳听点不是正中
心。就如能量在浴缸各头“来
回晃动”并在那里构筑了(交
换)压力(直至溢出),恰恰
在中心位置是压力的最小点,
也就是说,没有(超)低音。
下表列出了一些频率数值,在
这些频率下效果最明显:
Abstand paralleler Wände
Distance between parallel walls
平行的墙壁间的距离
Frequenz des Schalldruck-Minimums in der Mitte zwischen den Wänden
Frequency of pressure minimum i the middle of the walls
墙壁间中心位置的最小声压的频率
10 m
8 m
6 m
5 m
4 m
3 m
2,5 m (Raumhöhe/room height/空间高度)
17 Hz
21 Hz
29 Hz
34 Hz
43 Hz
57 Hz
68 Hz
14


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