Alpine X009E, Руководство пользователя

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47
-EN
01GB05X009E.fm
ALPINE X009E 68-24567Z66-A (EN)
Adjust the time correction level of the front left speaker to a high value
and the rear right to zero or a low value.
The sound is not balanced because the distance between the
listening position and the various speakers is different.
The difference in distance between the front left speaker and the rear
right speaker is 1.75 m (68-7/8").
Here we calculate the time correction value for the front left speaker
in the diagram on the above.
Conditions:
Farthest Speaker – listening position : 2.25 m (88-9/16")
Front left speaker – listening position : 0.5 m (19-11/16")
Calculation: L = 2.25 m – 0.5 m = 1.75 m (68-7/8")
Time correction = 1.75 ÷ 343
*
× 1,000 = 5.1 (ms)
* Speed of sound: 343 m/s (765 mph) at 20°C
In other words, giving the front left speaker a time correction value of
5.1 ms makes it seem as if its distance from the listener is the same
as the distance to the farthest speaker.
Time correction eliminates the differences in the time required for the
sound to reach the listening position.
The time of the front left speaker is corrected by 5.1 ms so that its
sound reaches the listening position at the same time as the sound of
other speakers.
Adjust the time correction level of each speaker to almost the same level.
1
Sit in the listening position (driver’s seat, etc.) and
measure the distance (in metres) between your head
and the various speakers.
2
Calculate the difference between the distance
correction value to the farthest speaker and the
other speakers.
L = (distance to farthest speaker) – (distance to other
speakers)
These values are the time correction values for the different
speakers. Setting these values to make each sound reach the
listening position at the same time as the sound of other speakers.
Time Correction Value List
Example 1. Listening Position: Front Left Seat
Example 2. Listening Position: All Seats
5.1ms
2.25m
0.5m
Time
Difference
(msec)
Distance
(cm)
Distance
(inch)
Time
Difference
(msec)
Distance
(cm)
Distance
(inch)
0.0 0.0 0.0 5.1 173.4 68.3
0.1 3.4 1.3 5.2 176.8 69.7
0.2 6.8 2.7 5.3 180.2 71.0
0.3 10.2 4.0 5.4 183.6 72.4
0.4 13.6 5.4 5.5 187.0 73.7
0.5 17.0 6.7 5.6 190.4 75.0
0.6 20.4 8.0 5.7 193.8 76.4
0.7 23.8 9.4 5.8 197.2 77.7
0.8 27.2 10.7 5.9 200.6 79.1
0.9 30.6 12.1 6.0 204.0 80.4
1.0 34.0 13.4 6.1 207.4 81.7
1.1 37.4 14.7 6.2 210.8 83.1
1.2 40.8 16.1 6.3 214.2 84.4
1.3 44.2 17.4 6.4 217.6 85.8
1.4 47.6 18.8 6.5 221.0 87.1
1.5 51.0 20.1 6.6 224.4 88.4
1.6 54.4 21.4 6.7 227.8 89.8
1.7 57.8 22.8 6.8 231.2 91.1
1.8 61.2 24.1 6.9 234.6 92.5
1.9 64.6 25.5 7.0 238.0 93.8
2.0 68.0 26.8 7.1 241.4 95.1
2.1 71.4 28.1 7.2 244.8 96.5
2.2 74.8 29.5 7.3 248.2 97.8
2.3 78.2 30.8 7.4 251.6 99.2
2.4 81.6 32.2 7.5 255.0 100.5
2.5 85.0 33.5 7.6 258.4 101.8
2.6 88.4 34.8 7.7 261.8 103.2
2.7 91.8 36.2 7.8 265.2 104.5
2.8 95.2 37.5 7.9 268.6 105.9
2.9 98.6 38.9 8.0 272.0 107.2
3.0 102.0 40.2 8.1 275.4 108.5
3.1 105.4 41.5 8.2 278.8 109.9
3.2 108.8 42.9 8.3 282.2 111.2
3.3 112.2 44.2 8.4 285.6 112.6
3.4 115.6 45.6 8.5 289.0 113.9
3.5 119.0 46.9 8.6 292.4 115.2
3.6 122.4 48.2 8.7 295.8 116.6
3.7 125.8 49.6 8.8 299.2 117.9
3.8 129.2 50.9 8.9 302.6 119.3
3.9 132.6 52.3 9.0 306.0 120.6
4.0 136.0 53.6 9.1 309.4 121.9
4.1 139.4 54.9 9.2 312.8 123.3
4.2 142.8 56.3 9.3 316.2 124.6
4.3 146.2 57.6 9.4 319.6 126.0
4.4 149.6 59.0 9.5 323.0 127.3
4.5 153.0 60.3 9.6 326.4 128.6
4.6 156.4 61.6 9.7 329.8 130.0
4.7 159.8 63.0 9.8 333.2 131.3
4.8 163.2 64.3 9.9 336.6 132.7
4.9 166.6 65.7
5.0 170.0 67.0
01GB00X009E.book Page 47 Friday, May 9, 2014 1:16 PM