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21 Cards in this Set
- Front
- Back
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What are the 3 Coincident Pairs? |
XY Blumlein Mid-Side (MS) |
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What mics and what angle are used in XY? |
2 Cardioids mics 90-120 degrees |
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What mics and what angle are used in Blumlien |
2 Bi-Directional Mics (Figure 8s) 90 degree angle |
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What mics and what angle are used in Mid-Side (MS) |
1 Cardioid (Faced in the middle towards the sound source) & 1 Bi-directional (Figure 8) 90 Degrees apart |
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How do you decode Mid-Side (MS) |
1. Cardioid mic (Middle Mic) is panned in the center 2. Figure 8 (Bi-Directional) has two channels pan left and right. 3. Flip phase on the right channel |
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What are the 3 near Coincidence Pairs? |
Nos ORTF DIN |
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What mics and what angle are used in NOS |
2 Cardioids 90 degrees 36 cm apart |
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What mics and what angle are used in ORTF |
2 Cardioids 110 degrees 17 cm apart |
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What mics and what angle are used in DIN |
2 Cardioids 90 degrees 20 cm apart |
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What are the two spaced pair? |
A/B Decca Tree |
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What mics and what angle are used in A/B |
2 spaced Cardioids or 2 Bi-Directional 3:1 |
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What mics and what angle are used in Decca Tree? |
3 omni in a triangle 2 meters apart center mic 1 1/2 |
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What is critical distance? |
The point where sound gets lost in the room or the point in space where the combined amplitude of all the reflected echoes are the same as the amplitude of the sound coming directly from the source |
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What is comb filtering? |
adelayed version of a signal to itself, causing constructive and destructive interference. |
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What is the cause of comb filtering? |
signals that are identical but have phase differences |
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what is a pressure gradient mic? |
which both sides of the diaphragm are exposed to the incident sound. or sound hits both sides of the capsules of the mic |
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What are the two binaural cues? |
Interaural time arrival differences Interaural Intensity differences |
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What freq is harder to locate and why? |
Low Freq. because of diffraction. the wavelengths wraps around our head and hits both ears at the same time. |
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What is a pressure type mic (PURE)? |
a mic where sounds hit one side of the capsules in the mic |
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What is transfer function? |
Frequency response of the ear canal |
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What is the vertical localisation? |
The direct sound & sound reflected from the pinna; creating a notch filter (6.5Khz-7.5Khz) |
