03/04/16

PRINCIPLES OF THE NOS STEREO TECHNIQUE

The NOS setup consists of two first-order cardioid microphones spaced 30 cm (11.8 in) apart and angled 90°. The name NOS is an abbreviation of Nederlandse Omroep Stichting (The Dutch Broadcast Foundation).
Keywords: NOS, two channel stereo, 90-degree angling, spacing,

The NOS setup consists of two first-order cardioid microphones spaced 30 cm (11.8 in) apart and angled 90°. The name NOS is an abbreviation of Nederlandse Omroep Stichting (The Dutch Broadcast Foundation).

This Stereo Technique uses two first-order cardioid microphones spaced 30 cm (11.8 in) apart and angled at 90° to create a stereo image. Thus, the setup is a combination of difference-in-level stereo and difference-in-time stereo.

Basically, the recording angle of NOS is ±40°.

If used at larger distances to the sound source, the NOS stereo technique may lose the lower frequencies. This loss is due to the use of pressure gradient microphones and hence the possible influence of the proximity of these microphones. The microphones selected should have a flat response for distant sources.

This stereo technique is more useful at shorter distances, for example on a piano, small ensembles or when used to create stereo sound on an instrument section in a classical orchestra.

As the name suggests, this setup has been standardized by NOS, an abbreviation of Nederlandse Omroep Stichting (in English: The Dutch Broadcast Foundation).
 

Suggested microphone kits and accessories

d:dicate™ ST2011A Stereo Pair with 2011A Cardioids
d:dicate™ ST4011A Stereo Pair with 4011A Cardioids
SB0400 Stereo Boom, Modular
UA0837 Stereo Boom
DUA0019 Spacer for Stereo Boom, 19 mm (0.75 in)

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