2017年02月23日

Pink noise

Pink noise is a noise sound that the power is inversely proportional to frequency, and the energy per octave is constant. It is a noise passed through a low pass filter of -3dB/ oct for White noise. On the other hand, White noise is such that the energy of each frequency is constant, and the energy level rises at the rate of +3dB/oct when the frequency increases.

Therefore, Pink noise becomes a frequency characteristic that goes down to the right as the frequency increases. Since the energy for each constant frequency band becomes uniform, it is noise suitable for the purpose of evaluating the volume of each frequency band. Pink noise is often used for sound adjustment and measurement because the sound intensity is the same in any octave band.

Incidentally, it is said that Pink noise is the same as what is said to be "1/f fluctuation" or "1/f noise" and it is said to be close to the distribution of sound in the natural world. Since Pink noise resembles an actual music signal because it has a spectrum, you can give the sound system the same stress as the music signal.

For example, you can measure the frequency characteristics of a sound system and calibrate it using an octave band or 1/3 octave band real-time analyzer.
At this time, our Realtime Analyzer application "Audio Frequency Analyzer" and "fo-Kannon" are also available. If you play back Pink noise from your audio system, it measures the characteristic frequency spectrum by setting of LEVEL and HOLD in the 1/3 Octave mode on our app. You can see the overall frequency response result of the audio playback environment. While feedback in realtime by using this result, you can easily improve the sound quality of your audio environment.

【Soundの最新記事】
posted by toons at 17:39| Sound