In order to perform a simplified manner volume measured using the

The exhaust noise level has three of noise values, check license plate such as follows. is the noise level of running at a noise level "proximity exhaust noise" constant speed in a state of maintaining the proper number of revolutions in the stop state "steady running noise" noise value during acceleration "accelerated running noise" everyone noise values that are published in the familiar muffler specifications table is that of "proximity exhaust noise." It has become stricter with respect to year after year noise regulation value, but if you'll look at the table, "proximity exhaust noise method reference value" below, you can see whether the appropriate bike to what regulations everyone is in your ride.
In order to perform a simplified manner volume measured using the "iPhone" In Webike, I was selected the application to see the review, such as the iTunes store. And peak the approximate app volume measurements, had been equipped with the ability to display an average value, I felt actually closest to the usability of the measuring instrument that is being used in proximity volume measurement test app, " The dBMeter Pro "which was a reason, this time we gave a simple measurement using the" dBMeter Pro ".
Using "iPhone", at the back 45 10 from the simple volume measurement method muffler end of proximity exhaust noise (omissions iPhone of the compass), turn the microphone side of the "iPhone" to 50cm away. In rotation speed of 75% of the speed during the prime mover of the highest output (50% the apparatus having the rotational speed at the time of maximum output exceeds the per minute 5000 rotation check license plate of the motor bike), about 5 seconds in succession the condition being unloaded operation, the maximum noise value at the time of releasing the throttle and "sputtering" is set to "measured value".
I've also performed precision comparison of the measuring instrument that is actually check license plate used in the proximity volume measurement test, and read the "peak value" of the measured values of "dBMeter Pro" instead of "average value", the difference between check license plate the measuring instrument There + - it was found that it is possible to measure with a high degree of accuracy than I thought about several dB. However, while measuring to keep the rotation by opening the throttle is difficult in one person, you need to measure at least two people. In addition, if the wind is strong, since correct measurement result under the influence of wind can not be obtained, is as much as possible the day the wind there is no desirable. Because it is only a result of simple measurement, this result is not possible to assert that the proximity volume measurements of your car, it will be an indication of "how much of the volume of the?". Everyone certainly once, please try to measure!
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