Calculation formula of sound delay

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1, the concept of delay is actually to put each speaker

It is best that the sound can reach your setting at the same time.

The position of the emperor, such as the driving position. Active in car stereo.

In partials, the most important thing is the treble of each channel, and

Bass, because it is different from the home stereo installed on the plane, adopts time delay technology to make the treble and bass reach the listening position at the same time; This is one of them.

Second, there is no need to adjust the balance of the left and right channels.

Balance function, (as long as it is a car audio expert.

Machine, with this function), let you accurate.

The middle sound stage position restored by the left and right channels is transferred to you.

Just in front of the car, or in the middle of the car.

How to calculate the delay is related to the brand of the host.

Related to design, the most famous Japanese Alps in the industry is

Display time, pioneer is directly using distance.

Measurement method: the position from each speaker to the listener.

Actual distance, directly measure each speaker with a tape measure (height

Tone, bass) to the position of the audience (with a real person sitting)

For driver's reference), record the distance from each unit to the speaker. B, Alpine's host or processor: it is made up of

Ms (millisecond), usually one step is 0. 1 ms, and its delay processing refers to the speaker with the farthest distance, and other speakers use their distances in turn.

Difference, in mm mm, divided by the speed of sound in the air of 343m/s, you can get this value, for example.

The measured distance difference is 1.25m, so the required delay of the speaker to the reference speaker is 3.6ms, and the delay processing of each speaker is completed in this way.

For example, the bass of the right rear channel is usually the farthest, such as 2.25m, and the bass of the left front channel is, for example.

0.5m, the left front channel is calculated as follows

2.25-0.5 =1.75m,

1.75×1000/343 = 5.1millisecond. Not recommended if required here.

The input value of the track is 0.

C, Pioneer's mainframe and processor: in millimeters.

Meters, usually each step is 12.7mm (half an inch

Inches), its method is very simple, direct measurement.

The distance of each speaker can be input into the corresponding channel.

3, ultra-low delay, the relationship between phase is greater than the relationship between distance. Because ultra-low will generally reduce the sound below 80Hz, and its wavelength exceeds 4m, then calculate the distance.

The method basically fails to meet the requirements, and the measurement is very inaccurate. At this time, the ultra-low delay, the most important thing is to match the bass phase, so that the ultra-low phase and the front sound field.

Bass matching. The most important thing here is to consider the hearing of the tuner and the sound of the ultra-low street connection ~

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