1. The passage for inlet and otlet of air in the lungs is called  20mmamplitudeechofroMusicalShrillnesstowind pipe.

2. Loudness is determined by the  20mmamplitudeechofroMusicalShrillnesstowind pipe of vibration.

3.  20mmamplitudeechofroMusicalShrillnesstowind pipe of sound is determined by the frequency of sound.

4. The reflected sound if heard distinctly from the original sound is called an  20mmamplitudeechofroMusicalShrillnesstowind pipe.

5. The normal length of vocal cord of a man is about  20mmamplitudeechofroMusicalShrillnesstowind pipe long.

6.  20mmamplitudeechofroMusicalShrillnesstowind pipe sound is one which gives a pleasant sensation to mind.

7. Vibration is a repeated  20mmamplitudeechofroMusicalShrillnesstowind pipe and  20mmamplitudeechofroMusicalShrillnesstowind pipe motion.