The sound is introduced into the narrow end of the megaphone, by holding it up to the face and speaking into it, and the sound waves radiate out the wide end. The megaphone increases the volume of sound by increasing the acoustic impedance seen by the vocal cords, matching the impedance of the vocal cords to the air, so that more sound power is radiated. It also serves to direct the sound waves in the direction the horn is pointing. It somewhat distorts the sound of the voice because the frequency response of the megaphone is greater at higher sound frequencies.
transformer works induction principle
piezo electric principle
A working principle is a regulation or rule that is used so that work can be done. This is a general phrase that can be used in any circumstance from the working principle of a motor, to the working principle of a solar cells.
Q-meter works on the principle of Series Resonance
Explain the workin principle of uln and its abbreviation
Megaphone is a noun.
I'll forego the megaphone. Your megaphone could use a fresh coat of paint.
The cheerleader used a megaphone to amplify her voice during the pep rally.
The megaphone is not a chemical compound !!
Megaphone - band - was created in 2004.
Megaphone Team was created in 2003.
I used a megaphone to get the students attention.
The Braindead Megaphone has 272 pages.
A megaphone is something cheerleaders speak into to be louder!
Operation Megaphone happened on 2000-07-30.
The Braindead Megaphone was created on 2007-09-04.
The megaphone was invented in 1878 by Thomas Edison