About
Time
Correction
The distance between the listener and the speakers
in
a car vary widely
due to the complex speaker placement. This difference in the distances
from the speakers to the listener creates a shift in the sounds image and
frequency characteristics. This is caused by the time delay between the
sound reaching the listener's right versus the left ear.
To
correct this. this unit
is
able to delay the audio signal
to
the speakers
closest to the listener. This effectively creates a perception
of
increased
distance for those speakers. The listener can be placed at an equal
distance between the left and right speakers for optimum staging.
The adjustment will be made for each speaker in 3.4cm steps.
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 -7
343.
1
x 1000 = 5.1
(ms)
./
Speed
of
sound: 343
m1s
(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.
"]~~!!IIILi}'t(IIIIiIfll!.~,I(I§!!J1'~~1
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 meters) 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)
34-EN
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
Delay
Time
Distance Distance
Delay
Time
Distance
Distance
Difference
Difference
Number
(ms)
(em)
(inch)
Number
(ms)
(em)
(inch)
0
0.0 0.0 0.0
51
5.1
173.4
68.3
1
0.1
3.4
1.3
52
5.2
176.8
69.7
2
0.2
68
2.7
53
5.3
180.2
710
3
03
10.2
4.0
54
5.4
183.6
72.4
4
0.4
13.6
5.4
55
5.5
187.0
73.7
5
0.5
170
6.7
56
5.6
190.4
75.0
6
0.6
20.4
80
57
5.7
193.8
76.4
7 0.7
238
9.4
58
5.8 1972 77.7
8
0.8
27.2
10.7
59
5.9
200.6
79.1
9
09
30.6
12.1
60
6.0
204.0
80.4
10
10
340
13.4
61
61
207.4
81.7
11
1.1
37.4
14.7
62
6.2
210.8
83.1
12
1.2
408
16.1
63
63
214.2
84.4
13
1.3
44.2
17.4
64
6.4
217.6
85.8
14
1.4
47.6
18.8
65
6.5
221.0
87.1
15
15
510
20.1
66
6.6
224.4
88.4
16
1.6
54.4
21.4
67
6.7
227.8
89.8
17
1.7
578
22.8
66
6.8
231.2
91.1
18
18
612
24.1
69
69
234.6
92.5
19
1.9
64.6
25.5
70
7.0
238.0
938
20
2.0
68.0
26.8
71
7.1
241.4
95.1
21
2.1
71.4
28.1
72
7.2
244.8
96.5
22
2.2
748
29.5
73
73
248.2
97.8
23
2.3
78.2
308
74
7.4
251.6
99.2
24
2.4
81.6
32.2
75
75
255.0
100.5
25
25
85.0
33.5
76
76
258.4
1018
26
2.6
88.4
34.8
77
7.7
261.8
1032
27
2.7
91.8
36.2
78
7.8
265.2
104.5
28
2.8
95.2
37.5
79
7.9
268.6
1059
29
2.9
98.6
38.9 80
8.0
272.0
107.2
30
30
102.0
40.2
81
8.1
275.4
1085
31
3.1
105.4
415
82
8.2
278.8
109.9
32
3.2
108.8
42.9
83
8.3
282.2
111.2
33
33
1122
44.2
84
8.4
285.6
112.6
34
3.4
115.6
45.6
85
8.5
289.0
113.9
35
35
119.0
46.9
86 8.6
292.4
115.2
36
3.6
122.4
48.2
87
8.7
295.8
116.6
37
3.7
125.8
496
88
8.8
299.2
117.9
38
38
1292
50.9
89
89
302.6
119.3
39
3.9 1326
52.3
90
90
306.0
120.6
40
4.0
136.0
536
91
9.1
309.4
121.9
41
4.1
139.4
54.9
92
92
312.8
123.3
42
4.2
142.8
56.3
93
9.3
316.2
124.6
43
4.3
146.2
576
94
9.4
319.6
126.0
44
4.4
149.6
59.0
95
9.5
323.0
127.3
45
4.5
153.0
603
96
9.6
326.4
128.6
46
4.6
156.4
61.6
97
97
3298
130.0
47
4.7
159.8
63.0
98
9.8
333.2
131.3
48
4.8
163.2
64.3
99
99
336.6
132.7
49
4.9
166.6
65.7
-------
50
5.0
170.0
670
About
Time
Correction
The distance between the listener and the speakers
in
a car vary widely
due to the complex speaker placement. This difference in the distances
from the speakers to the listener creates a shift in the sounds image and
frequency characteristics. This is caused by the time delay between the
sound reaching the listener's right versus the left ear.
To
correct this. this unit
is
able to delay the audio signal
to
the speakers
closest to the listener. This effectively creates a perception
of
increased
distance for those speakers. The listener can be placed at an equal
distance between the left and right speakers for optimum staging.
The adjustment will be made for each speaker in 3.4cm steps.
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 -7
343.
1
x 1000 = 5.1
(ms)
./
Speed
of
sound: 343 mls (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.
"]~~!!IIILi}'t(IIIIiIfll!.~,I(I§!!J1'~~1
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 meters) 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)
34-EN
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
Delay
Time
Distance Distance
Delay
Time
Distance
Distance
Difference
Difference
Number
(ms)
(em)
(inch)
Number
(ms)
(em)
(inch)
0
0.0 0.0 0.0
51
5.1
173.4
68.3
1
0.1
3.4
1.3
52
5.2
176.8
69.7
2
0.2
68
2.7
53
5.3
180.2
710
3
03
10.2
4.0
54
5.4
183.6
72.4
4
0.4
13.6
5.4
55
5.5
187.0
73.7
5
0.5
170
6.7
56
5.6
190.4
75.0
6
0.6
20.4
80
57
5.7
193.8
76.4
7 0.7
238
9.4
58
5.8 1972 77.7
8
0.8
27.2
10.7
59
5.9
200.6
79.1
9
09
30.6
12.1
60
6.0
204.0
80.4
10
10
340
13.4
61
61
207.4
81.7
11
1.1
37.4
14.7
62
6.2
210.8
83.1
12
1.2
408
16.1
63
63
214.2
84.4
13
1.3
44.2
17.4
64
6.4
217.6
85.8
14
1.4
47.6
18.8
65
6.5
221.0
87.1
15
15
510
20.1
66
6.6
224.4
88.4
16
1.6
54.4
21.4
67
6.7
227.8
89.8
17
1.7
578
22.8
66
6.8
231.2
91.1
18
18
612
24.1
69
69
234.6
92.5
19
1.9
64.6
25.5
70
7.0
238.0
938
20
2.0
68.0
26.8
71
7.1
241.4
95.1
21
2.1
71.4
28.1
72
7.2
244.8
96.5
22
2.2
748
29.5
73
73
248.2
97.8
23
2.3
78.2
308
74
7.4
251.6
99.2
24
2.4
81.6
32.2
75
75
255.0
100.5
25
25
85.0
33.5
76
76
258.4
1018
26
2.6
88.4
34.8
77
7.7
261.8
1032
27
2.7
91.8
36.2
78
7.8
265.2
104.5
28
2.8
95.2
37.5
79
7.9
268.6
1059
29
2.9
98.6
38.9 80
8.0
272.0
107.2
30
30
102.0
40.2
81
8.1
275.4
1085
31
3.1
105.4
415
82
8.2
278.8
109.9
32
3.2
108.8
42.9
83
8.3
282.2
111.2
33
33
1122
44.2
84
8.4
285.6
112.6
34
3.4
115.6
45.6
85
8.5
289.0
113.9
35
35
119.0
46.9
86 8.6
292.4
115.2
36
3.6
122.4
48.2
87
8.7
295.8
116.6
37
3.7
125.8
496
88
8.8
299.2
117.9
38
38
1292
50.9
89
89
302.6
119.3
39
3.9 1326
52.3
90
90
306.0
120.6
40
4.0
136.0
536
91
9.1
309.4
121.9
41
4.1
139.4
54.9
92
92
312.8
123.3
42
4.2
142.8
56.3
93
9.3
316.2
124.6
43
4.3
146.2
576
94
9.4
319.6
126.0
44
4.4
149.6
59.0
95
9.5
323.0
127.3
45
4.5
153.0
603
96
9.6
326.4
128.6
46
4.6
156.4
61.6
97
97
3298
130.0
47
4.7
159.8
63.0
98
9.8
333.2
131.3
48
4.8
163.2
64.3
99
99
336.6
132.7
49
4.9
166.6
65.7
-------
50
5.0
170.0
670
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