![](/images/new-backgrounds/1150341/15034111x1.webp)
Beta 181/C
dB
+20
+10
0
20 | 50 | 100 |
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| 150° | 180° | 150° |
| 150° | 180° | 150° |
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| 120° |
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| 120° | 120° |
| 120° |
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| 90° |
| 90° | 90° | 90° | ||
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| 60° |
| 60° | 60° | 60° | ||
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| 30° | +5 dB | 30° |
| 30° | +5 dB | 30° |
2 | 3 | 4 5 6 789 | 2 | 3 | 4 5 6 789 | 20000 |
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| 1000 |
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| 10000 | 250 Hz |
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| 2500 Hz |
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| Hz |
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| 500 Hz |
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| 6400 Hz |
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| 1000 Hz |
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| 10000 Hz |
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Beta 181/S
dB
+20
+10
0
20 | 50 | 100 |
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| 150° | 180° | 150° |
| 150° | 180° | 150° |
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| 120° |
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| 120° | 120° |
| 120° |
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| 90° |
| 90° | 90° | 90° | ||
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| 60° |
| 60° | 60° | 60° | ||
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| 30° | +5 dB | 30° |
| 30° | +5 dB | 30° |
2 | 3 | 4 5 6 789 | 2 | 3 | 4 5 6 789 | 20000 |
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| 1000 |
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| 10000 | 250 Hz |
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| 2500 Hz |
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| Hz |
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| 500 Hz |
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| 6400 Hz |
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| 1000 Hz |
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| 10000 Hz |
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Beta 181/O
dB
+20
+10
0
20 | 50 | 100 |
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| 150° | 180° | 150° |
| 150° | 180° | 150° |
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| 120° |
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| 120° | 120° |
| 120° |
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| 90° |
| 90° | 90° | 90° | ||
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| 60° |
| 60° | 60° | 60° | ||
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| 30° | +5 dB | 30° |
| 30° | +5 dB | 30° |
2 | 3 | 4 5 6 789 | 2 | 3 | 4 5 6 789 | 20000 |
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| 1000 |
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| 10000 | 250 Hz |
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| 2500 Hz |
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| Hz |
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| 500 Hz |
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| 6400 Hz |
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| 1000 Hz |
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| 10000 Hz |
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Beta 181/BI
dB
+20
+10
0
20 | 50 | 100 |
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| 150° | 180° | 150° |
| 150° | 180° | 150° |
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| 120° |
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| 120° | 120° |
| 120° |
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| 90° |
| 90° | 90° | 90° | ||
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| 60° |
| 60° | 60° | 60° | ||
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| 30° | +5 dB | 30° |
| 30° | +5 dB | 30° |
2 | 3 | 4 5 6 789 | 2 | 3 | 4 5 6 789 | 20000 |
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| 1000 |
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| 10000 | 250 Hz |
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| 2500 Hz |
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| Hz |
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| 500 Hz |
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| 6400 Hz |
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| 1000 Hz |
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| 10000 Hz |
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