DE860959C - Microphone arrangement for stereo recordings with two separate transmission channels - Google Patents
Microphone arrangement for stereo recordings with two separate transmission channelsInfo
- Publication number
- DE860959C DE860959C DEK5058D DEK0005058D DE860959C DE 860959 C DE860959 C DE 860959C DE K5058 D DEK5058 D DE K5058D DE K0005058 D DEK0005058 D DE K0005058D DE 860959 C DE860959 C DE 860959C
- Authority
- DE
- Germany
- Prior art keywords
- microphones
- transmission channels
- separate transmission
- microphone arrangement
- stereo recordings
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04S—STEREOPHONIC SYSTEMS
- H04S1/00—Two-channel systems
Description
Es ist bereits vorgeschlagen, für Stereo-Aufnahmen zwei Mikrofone zu verwenden, die nahe beieinander stehen, beispielsweise in einem Abstand von etwa .ao cm, und den Mikrofonen dabei eine Richtcharakteristik zu geben, die sich teilweise überlappt.It has already been suggested to use two microphones for stereo recordings to use that are close to each other, for example at a distance of about .ao cm, and to give the microphones a directional characteristic that partially differs overlaps.
Die Abbildung zeigt z. B. zwei solche Mikrofone 1111 und M2, deren Charakteristik durch die gestrichelten Linien dargestellt ist; die Wiedergabe erfolgt über getrennte Kanäle 1 und II und über getrennte Lautsprecher L1 und L2. Gegebenenfalls kann ein zweispuriger Aufzeichnungsträger dazwischen geschaltet sein. Die aufzunehmenden Schallquellen sind mit S1 und S2 bezeichnet. Die stereoakustische Wirkung beruht hierbei darauf, daß von den beiden Lautsprechern eine verhältnismäßig große, der Intensitätsdifferenz zwischen den Mikrofonen M1 und 1V12 entsprechende Schalldruckdifferenz wahrgenommen wird, was dem Zuhörer eine Empfindung für die Lage der Schallquellen vermittelt. Eine solche stereoakustische Wirkung kann aber bei der beschriebenen Anordnung nur bei verhältnismäßig schmalen Szenen erreicht werden. Wenn sich z. B. die Schallquellen S1 und S2 in Richtung der eingezeichneten Pfeile bewegen, oder wenn am Rand der Bühne eine andere Schallquelle in Tätigkeit tritt, so reicht die Spannungsdifferenz in den Mikrofonen M1 und M2 nicht aus, um eine solche Schalldruckdifferenz in den Lautsprechern zu erzielen, daß ,der Zuhörer die weiter seitlich liegenden Schallquellen dort lokalisiert, wo sie tatsächlich liegen. Um die Richtungsempfindungen auch in solchen Fällen sicherzustellen, werden gemäß der Erfindung zu beiden Seiten der Richtmikrofone 11l1 und 1Y12 zwei weitere Raummikrofone M3 und M4 außerhalb des Raumes zwischen den beiden Richtmikrofonen vorgesehen, die über Verstärker V3 und h4 mit dem Kanal I bzw. II des jeweils benachbarten Richtmikrofons zusätzlich speisen. Hierbei kann der Verstärkungsgrad so eingestellt werden, daß die für den gewünschten Effekt erforderliche Schalldruckdifferenz .in den Lautsprechern L1 und L2 entsteht. Die Mikrofone 113 und M4 können gegebenenfalls gegenüber der Szene erhöht angebracht sein..The figure shows e.g. B. two such microphones 1111 and M2, whose Characteristic is shown by the dashed lines; playback takes place via separate channels 1 and II and via separate loudspeakers L1 and L2. Possibly a two-track recording medium can be interposed therebetween. The ones to be recorded Sound sources are labeled S1 and S2. The stereo-acoustic effect is based here on the fact that of the two speakers a relatively large one, the Intensity difference between the microphones M1 and 1V12 corresponding sound pressure difference what is perceived is what gives the listener a sense of the location of the sound sources conveyed. Such a stereo-acoustic effect can, however, with the described Arrangement can only be achieved in relatively narrow scenes. If z. B. move the sound sources S1 and S2 in the direction of the arrows, or if another sound source is activated at the edge of the stage, that is sufficient Voltage difference in the microphones M1 and M2 does not result in such a sound pressure difference to achieve in the loudspeakers that the listener lies further to the side Sound sources localized where they actually are. About the sense of direction also ensure in such cases, according to the invention on both sides the directional microphones 11l1 and 1Y12 two further room microphones M3 and M4 outside of the space between the two directional microphones, which are transmitted via amplifier V3 and h4 with channel I or II of the adjacent directional microphone in addition Food. Here, the gain can be set so that the for the desired effect required sound pressure difference .in loudspeakers L1 and L2 is created. The microphones 113 and M4 can optionally face the scene to be raised ..
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEK5058D DE860959C (en) | 1940-10-15 | 1940-10-15 | Microphone arrangement for stereo recordings with two separate transmission channels |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEK5058D DE860959C (en) | 1940-10-15 | 1940-10-15 | Microphone arrangement for stereo recordings with two separate transmission channels |
Publications (1)
Publication Number | Publication Date |
---|---|
DE860959C true DE860959C (en) | 1952-12-29 |
Family
ID=7210660
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEK5058D Expired DE860959C (en) | 1940-10-15 | 1940-10-15 | Microphone arrangement for stereo recordings with two separate transmission channels |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE860959C (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE970822C (en) * | 1953-04-30 | 1958-10-30 | Nordwestdeutscher Rundfunk I L | Arrangement for generating a pseudo-stereophonic effect with several microphones |
DE1160893B (en) * | 1960-09-08 | 1964-01-09 | Deutsche Post Rundfunk | Compatible process for the optional monophonic, stereophonic, monophonic or stereo-ambiophonic recording, transmission and playback on 2 channels |
DE1196711B (en) * | 1960-10-12 | 1965-07-15 | Deutsche Post Rundfunk | Compatible procedure for monophonic, stereophonic, monophonic or stereo-ambiophonic recording, transmission and playback |
-
1940
- 1940-10-15 DE DEK5058D patent/DE860959C/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE970822C (en) * | 1953-04-30 | 1958-10-30 | Nordwestdeutscher Rundfunk I L | Arrangement for generating a pseudo-stereophonic effect with several microphones |
DE1160893B (en) * | 1960-09-08 | 1964-01-09 | Deutsche Post Rundfunk | Compatible process for the optional monophonic, stereophonic, monophonic or stereo-ambiophonic recording, transmission and playback on 2 channels |
DE1196711B (en) * | 1960-10-12 | 1965-07-15 | Deutsche Post Rundfunk | Compatible procedure for monophonic, stereophonic, monophonic or stereo-ambiophonic recording, transmission and playback |
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