Double key pressed at the same time: press at the same time to turn blue – to learn the ambient noise spectrum. 32-bit ARM Processor – Compared with traditional sound-controlled lights, this sound-controlled light has 32 built-in dazzling light beads, with a music-specific MIC and a 32-bit ARM processor with a main frequency of 72M. Do not immerse in water, or use in conditions where the humidity is higher than 90%. High quality the rhythm recognition light audio led bring you the ultimate experience. With intelligent noise-canceling algorithm, it can be used in noisy environment. Please do not access higher than 5V power supply, so as not to damage the motherboard, please use the power supply equipment certified by the relevant institution. Use the graph to adjust your equalizer to eliminate the peaks and valleys and achieve a smooth transition from frequency to frequency. This helps you determine how much more sound level one frequency has over another. The dots beside the bars that define the frequency display a sound level of either 1/10 or 3 dB. 
This graph is a visual reading of the sound of your system from 20 Hz to 20,000 Hz. Take the meter and stand outside the car when you run the test. Play the CD with pink noise through your sound system. Set the microphone stand on the driver's seat, so that the microphone is 26 inches above the seat - roughly the position of the driver's ears.įace the microphone toward the front of the dash. Remove briefcases, old soda cans, everything sound bounces off some surfaces and is absorbed by others, and these items influence the sound that is measured by the RTA. Look around the vehicle and take out all items that are not a part of the interior of the car. The stand needs to have a base securely weighted so that it will stay in one position without moving. The microphone will be attached to the stand and the assembly will be put on the driver's seat in the car. Make certain that you have a good stand for the RTA's microphone.
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