Stool color changes facts. Normal stool color is brown. This is due to the presence of bile in the stool. Normal stool color can range from light yellow to brown to almost black. If stool is red, maroon, black, clay-colored, pale, yellow, or green this may signify a problem.
08 February 2016. The longest continuous vocal note is 1 min 52 sec and was achieved by Alpaslan DurmuÅ (Turkey) at the KipdaÅ MÃ¼hendislik, Istanbul, Turkey, on 8 February 2016. The note was sustained above the required decibel threshold from a measurement distance of 2.5 metres.
The type of vocal cord vibration that produces the falsetto voice precludes loud singing except in the highest tones of that register; it also limits the available tone colors because of the simplicity of its waveform. Modal voice is capable of producing much more complex waveforms and infinite varieties of tone color.