Bundling factor
The bundling factor ( distance factor ) is a technical parameter of loudspeakers and microphones .
The bundling factor indicates how much larger the discussion distance of a microphone with a directional characteristic can be compared to that of a microphone with a spherical directional characteristic in order to obtain the same D / R ratio (D = direct sound , R = reflected sound ).
The bundling factor results from the root of the bundling degree :
| Microphone bundling ability | ||||
| Microphone characteristics | Degree of bundling γ | Bundling factor √ γ | ||
| Bullet | 1,000 | 1,000 | ||
| Wide cardioid (-9.5) | 2.077 | 1.441 | ||
| eight | 3,000 | 1.732 | ||
| kidney | 3,000 | 1.732 | ||
| Supercardioid | 3.732 | 1,932 | ||
| Hypercardioid | 4,000 | 2,000 | ||
See also
literature
- Norbert Pawera: Microphone Practice . Tips and tricks for stage and studio. Technology, acoustics and recording practice for instruments and vocals. 4th, completely revised and expanded edition. PPV-Medien, Bergkirchen 2003, ISBN 3-932275-54-3 .
- Heinz Sahm: HIFI loudspeakers. Basics of electrodynamic loudspeakers in an infinite baffle and in the housing. 2nd, improved edition. Franzis Verlag GmbH, Munich 1982, ISBN 3-7723-6522-1 .
Web links
- Degree of bundling of the microphones (PDF file; 100 kB)
- Theoretical microphone data on the directional characteristics (PDF file; 37 kB)
- Explanation of theoretical microphone data (PDF file; 33 kB)
- Difference between hypercardioid and supercardioid (PDF file; 118 kB)