Adjusting the Time Correction
Time Correction:
The distance between the listener and the speakers in a car vary widely due to the special conditions of the mobile environment. 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, the
The adjustment will be made for each speaker in a step of 0.1 mS.
Example 1. Listening Position: Front Left Seat
Adjust the time correction level of the front left speaker to a high value and the rear right to zero or a low value.
0.5 m | 5.1 ms |
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2.25 m |
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Here we calculate the time correction value for the front | |
right tweeter in the diagram at the left. | |
Conditions: |
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Farthest Speaker – listening position: 2.25 m | |
Front right tweeter – listening postion: 0.5 m | |
Calculation: L = 2.25 m – 0.5 m = 1.75 m | |
Time correction = 1.75 ÷ 343* ⋅ 1000 = 5.1 (ms) | |
*Speed of sound: 343 m/s (765 mph) at 20˚C | |
In other words, giving the front right tweeter a time correction value of 5.1 ms makes it seem as if the distance to the front right tweeter is the same as the distance to the farthest speaker.
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 right speaker and the rear left speaker is 1.75 m
Time correction eliminates the differences in the time required for the sound to reach the listening position.
The time of the front right 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.
Example 2. Listening Position: All Seats
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 to
the farthest speaker and the other speakers.
L = (distance to farthest speaker) – (distance to other speakers)
3 Divid the distances calculated for the speakers by the speed of sound (343 m/s (765 mph) at 20˚C).
These values are the time correction values for the different speakers.
4 Press the Digital Time Correction button for at least 2 seconds to switch to the Time correction adjusting mode.
5 Select a speaker to be adjusted by pressing the Preset buttons (F1 through F6) button within 10 seconds of step 4.
F1: F/L (Front Left Speaker)
F2: F/R (Front Right Speaker)
F3: R/L (Rear Left Speaker)
F4: R/R (Rear Right Speaker)
F5: S/L (Subwoofer Left)
F6: S/R (Subwoofer Right)
6 Adjust the time correction value by pressing the DN g button or the f UP button within 10 seconds of step 5.
To adjust the time correction value for other speaker, repeat the steps 5 and 6.
NOTE
The time correction setting adjusted can be memorized on memory.
Refer to "Memorizing the Time Correction Setting" on page 11.
Memorizing the Time Correction Setting
1 Adjust the time correction setting. (see this page)
2 Press the F button within 10 seconds of step 1.
3 Within 10 seconds after operating step 2, press and hold any one of the Preset buttons (F1 through F6) for at least 2 seconds. To memorize further, repeat the step 1 to 3.
Recalling the Memorized Time Correction Setting
1 Press the Digital Time Correction button to switch to the Time correction mode.
2 To recall your preset, pressing one of the Preset buttons (F1 through F6) within 10 seconds after the operation in step 1. You can recall the memorized setting.