World's Ten Most Colorful Flags. Here are ten of the most colorful flags from around the world. While it is fairly common for flags to have just three colors, like the red, white, and blue of the United States or the black, red, and gold of Germany, some flags are much more colorful than that. What makes a flag colorful tends to be a subjective decision, however.
The wind noise spectrum is dominated by the lower. frequencies (< 500 Hz), although at 27 mph when. saturation is present, the wind noise level can be greater. than 60 dB SPL at 8 kHz. It is clear that wind noise is at. high levels at commonly encountered wind speeds and. needs to be suppressed.
Is the frequency of sound measured in units called decibels?  The frequency of sound is measured in Hertz named after   Heinrich Rudolf Hertz, the first person to measure  electromagnetic waves. A single Hertz represents a single â¦cycle per  second. Humans can hear sound from about 40 hertz to nearly 15000  Hertz (also called 15 kilohertz, abbreviated as 15 Khz). Some  people with exceptional hearing range may go up to 20 Khz. Some  animals can hear even higher frequencies.     Decibels are a measurement of how loud a sound is.