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.
An audio frequency (abbreviation: AF) or audible frequency is characterized as a periodic vibration whose frequency is audible to the average human. The SI unit of audio frequency is the hertz (Hz). It is the property of sound that most determines pitch. The generally accepted standard range of audible frequencies is 20 to 20,000 Hz, although the range of frequencies individuals hear is greatly influenced by environmental factors. Frequencies below 20 Hz are generally felt rather than heard, assuming the amplitude of the vibration is great enough.