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GERICHTETE TIEFTONABSTRAHLUNG
DIPL.-ING. (FH) VOLKER HOLTMEYER

Gerichtete Tieftonabstrahlung
Dipl.-Ing. (FH) Volker Holtmeyer
GERICHTETE TIEFTONABSTRAHLUNG
DIPL.-ING. (FH) VOLKER HOLTMEYER

Warum ist eine gerichtete Tieftonabstrahlung sinnvoll?
1.Gleichmäßige Beschallung der Zuhörerfläche
2.

Aussparung der Randbereiche
- Raumbegrenzungsflächen
- Bühne
- Anwohner
GERICHTETE TIEFTONABSTRAHLUNG
DIPL.-ING. (FH) VOLKER HOLTMEYER

c
=
f

: Wellenlänge
c: Schallgeschwindigkeit (~ 344 m/s)
f: Frequenz
GERICHTETE TIEFTONABSTRAHLUNG
DIPL.-ING. (FH) VOLKER HOLTMEYER

Cardioid Arrays
End Fired Arrays

L/R-Aufstellung
Mono-Cluster
Zahnlücke, curved
Zahnlücke, delayed
Mono-Matrix
Geflogene vertikale Arrays
GERICHTETE TIEFTONABSTRAHLUNG
DIPL.-ING. (FH) VOLKER HOLTMEYER

Einzelne Subwoofer strahlen nicht vollständig omni-direktional ab!

100 Hz: ~5 dB
50 Hz: ~3 dB

Typische Rückwärtsdämpfung eines Single-18“
GERICHTETE TIEFTONABSTRAHLUNG
DIPL.-ING. (FH) VOLKER HOLTMEYER

s

1.  /4 Delay
2. invers

+/-

Sub 2
Sub 2

Cardioid-Array

Subs 1+3

Sub 1
Sub 1

t

Sub 3
Sub 3

s

Sub 2

t

Prozessing
Sub 2

s

t

+/-

t
GERICHTETE TIEFTONABSTRAHLUNG
DIPL.-ING. (FH) VOLKER HOLTMEYER

t

t

Sub 1

t

s

Sub 2

End-Fired-Array

Prozessing
Sub 1
Delay =

s

s

t

Sub 1

t

t

Sub 2

Sub 2

Sub 1

s
GERICHTETE TIEFTONABSTRAHLUNG
DIPL.-ING. (FH) VOLKER HOLTMEYER

End Fired Array
+ gute Rückwärtsdämpfung
+ mehr SPL
- muss mech. exakt aufgebaut werden
- großer Platzbedarf
- viel DSP nötig
GERICHTETE TIEFTONABSTRAHLUNG
DIPL.-ING. (FH) VOLKER HOLTMEYER

Cardioid Array
+ beste Rückwärtsdämpfung
+ nur 1x DSP nötig
- nicht max. SPL
GERICHTETE TIEFTONABSTRAHLUNG
DIPL.-ING. (FH) VOLKER HOLTMEYER

L/R-Aufstellung
+ Stereo
+ einfaches Handling
+ hohe Trennfrequenz möglich
+ kann zum Stacken der Tops benutzt werden
- Interferenzen
- geringe Reichweite
GERICHTETE TIEFTONABSTRAHLUNG
DIPL.-ING. (FH) VOLKER HOLTMEYER

Links/Rechts-Anordnung

4 Subs pro Seite

1 Sub pro Seite

50 Hz

63 Hz

80 Hz
GERICHTETE TIEFTONABSTRAHLUNG
DIPL.-ING. (FH) VOLKER HOLTMEYER

Mono-Cluster
+ max. SPL
+ wenige Amp-Kanäle
+ 1 DSP-Kanal
- Mono
- Trennfequenz? / Ortung
- evtl. viel Bass auf der Bühne
- evtl. störend (vor der Bühne)
GERICHTETE TIEFTONABSTRAHLUNG
DIPL.-ING. (FH) VOLKER HOLTMEYER

Mono-Array

auseinander gezogene

direkt nebeneinander

50 Hz

63 Hz

80 Hz
GERICHTETE TIEFTONABSTRAHLUNG
DIPL.-ING. (FH) VOLKER HOLTMEYER

Zahnlücke, delayed
- viel DSP
- Mono
+ einfacherer Aufbau
GERICHTETE TIEFTONABSTRAHLUNG
DIPL.-ING. (FH) VOLKER HOLTMEYER

„Zahnlücken“-Array

zeitliches
Curving

50 Hz

63 Hz

80 Hz
GERICHTETE TIEFTONABSTRAHLUNG
DIPL.-ING. (FH) VOLKER HOLTMEYER

Zahnlücke, curved
+ wenig DSP
- Mono
- Aufbau aufwendig
- Beam in der Bühnenmitte
- sehr großer Platzbedarf
GERICHTETE TIEFTONABSTRAHLUNG
DIPL.-ING. (FH) VOLKER HOLTMEYER

„Zahnlücken“-Array

zeitliches
Curving

50 Hz

63 Hz

80 Hz
GERICHTETE TIEFTONABSTRAHLUNG
DIPL.-ING. (FH) VOLKER HOLTMEYER

Mono-Matrix
+ beste Richtwirkung
- Mono
- max. DSP/Amps
- sehr großer Platzbedarf
GERICHTETE TIEFTONABSTRAHLUNG
DIPL.-ING. (FH) VOLKER HOLTMEYER

Geflogene vertikale Arrays
+ Stereo
+ sehr gute Pegelverteilung
- Interferenzen
- aufwändig
GERICHTETE TIEFTONABSTRAHLUNG
DIPL.-ING. (FH) VOLKER HOLTMEYER

Fazit
Einzelne Tieftonlautsprecher haben von Natur aus eine sehr geringe Richtwirkung.
Durch spezielle Anordnungen können Punktquellen mit einer signifikanten Richtwirkung
erzeugt werden.
Durch die Bildung von großen Arrays kann die Richtwirkung gesteigert und die Vorteile
von Linienstrahlern genutzt werden.
Danke! Fragen?
GERICHTETE TIEFTONABSTRAHLUNG
DIPL.-ING. (FH) VOLKER HOLTMEYER

Dieses pdf-Dokument vermag die Präsentation teils nur unzureichend darzustellen.
Auf Anfrage verschicke ich gerne eine pps-Datei.
info@volkerholtmeyer.de

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Gerichtete Tieftonabstrahlung | Tonmeistertagung 2010