About the 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 left ear. To correct this, the
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.
| 5.1ms |
0.5m |
|
2.25m |
|
∗ | ∗ |
Tips
*Subwoofer speaker
You cannot change the time correction value for the subwoofer, but you can set the subwoofer’s apparent position to the front by adjusting the time correction value of the front and rear speakers.
For details, refer to the “Tips” on page 41.
Here we calculate the time correction value for the front left speaker in the diagram above.
Conditions:
Farthest Speaker – listening position: 2.25 m
Front left speaker – listening position: 0.5 m
Calculation: L = 2.25 m – 0.5 m = 1.75 m
** Speed of sound: 343 m/s (765 mph) at 20°C
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
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.
In other words, giving the front left speaker a time correction value of 5.1 ms makes it seem as if the distance to the front left speaker is the same as the distance to the farthest speaker.
Example 2. Listening Position: All Seats
Adjust the time correction level of each speaker to almost the same level.
1Sit in the listening position (driver’s seat, etc.) and measure the distance (in meters) between your head and the various speakers.
2Calculate the difference between the distance to the farthest speaker and the other speakers.
L = (distance to farthest speaker) – (distance to other speakers)
3Divide 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.
Adjustment and Storing/Recalling of Time Correction
Before performing the following procedures, refer to “About the Time Correction” (page 39).
Setting item: T.CORR (TIME CORRECTION)
Setting contents: 0.0 - 9.9
1Touch [
] of T.CORR.
The screen changes to the
2Touch [
] or [
] of the desired speaker to adjust the time correction value (0.0 to 9.9).
3Repeat Step 2 above to set another speaker.
4Touch [RETURN] to return to the previous screen.
•The setting contents which have been set in “Time Correction” are applied for the Bass Focus mode.
•The time correction adjusting function can be applied for
Storing the Adjusted Contents
The storing/recalling of time correction operation is performed after Step 4 above.
5Touch [MEMORY] on the BASS ENGINE screen.
6Within 5 seconds, touch any one of preset buttons [P.SET 1] through [P.SET 6].
The adjusted contents will be stored on the preset number you touch.
•The stored contents on the P.SET number remain undeleted despite a reset operation or disconnection of the battery power cord.
•Adjusted/set contents of each setting item in Bass Engine can be stored in the preset buttons (1 through 6).
Recalling the Stored Time Correction Setting
The storing/recalling of time correction operation is performed after Step 4 above.
5Touch any one of [P.SET 1] to [P.SET 6] on the BASS ENGINE screen.
The stored adjusting contents will be recalled.