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Megaphone
Megaphone.mp3
Megaphone.mp4
Megaphone-Pt-2.mp3
Megaphone-Pt-2.mp4
Megaphone-intro.mp3
[Intro]
Is your voice by choice
(Megaphone prone)
[Verse 1]
Are you sitting
(Idly by)
Babysitting
(Ready to cry)
[Bridge]
Is your voice by choice
(Megaphone prone)
[Chorus]
Get off your seat
(And on the street)
Make a sound
(That is found)
[Bridge]
A word (that’s heard)
[Verse 2]
Are you waiting
(On participating)
Leave the solution
(To another’s revolution)
[Bridge]
Is your voice by choice
(Megaphone prone)
[Chorus]
Get off your seat
(And on the street)
Make a sound
(That is found)
[Outro]
A word (that’s heard)
Get off your seat
(And on the street)
Make a sound
(That is found)
Make it loud
(Be a thundercloud)
ABOUT THE SCIENCE
A megaphone does not electronically amplify sound (like a powered speaker does); instead, it
uses a simple acoustic principle to make a person’s natural voice project farther and more clearly.
It works by performing two main functions:
1. Directing the Sound (Focusing Energy)
Without a megaphone, your voice travels outward spherically in all directions. As sound waves spread out over a larger area, their energy dissipates quickly, and the volume drops off rapidly. The cone shape of the megaphone forces the sound waves produced by your mouth into a narrower, forward-facing beam. This concentrates all the acoustic energy that would normally be wasted traveling up, down, and behind you, directing it specifically toward the intended audience.
2. Matching Acoustic Impedance (Improving Efficiency)
This is the more scientific reason the megaphone works well. Sound travels best between mediums that have similar acoustic impedance (a measure of how much a medium resists the flow of sound energy).
* There is a significant difference in acoustic impedance between the high-pressure air inside your mouth and the open air of the environment.
* When sound leaves your open mouth directly into the open air, much of the sound energy is actually reflected back at you because the impedance mismatch is so high. It’s an inefficient transfer of energy.
The megaphone acts as an acoustic impedance transformer or “matching” device. It provides a gradual transition:
* The small opening is close to the impedance of your mouth.
* The large opening at the flare end is close to the impedance of the open environment.
By gradually changing the cross-sectional area, the megaphone helps the sound waves efficiently transition from high-pressure air inside the cone to the open atmosphere, ensuring more of the sound energy is successfully broadcast outward rather than being reflected back into your throat.
Summary
A megaphone makes your voice louder by focusing the sound waves into a beam and improving the efficiency with which that sound energy leaves the horn and enters the open air.
From the album “Amplification“
View all episodes
By Megaphone.mp3
Megaphone.mp4
Megaphone-Pt-2.mp3
Megaphone-Pt-2.mp4
Megaphone-intro.mp3
[Intro]
Is your voice by choice
(Megaphone prone)
[Verse 1]
Are you sitting
(Idly by)
Babysitting
(Ready to cry)
[Bridge]
Is your voice by choice
(Megaphone prone)
[Chorus]
Get off your seat
(And on the street)
Make a sound
(That is found)
[Bridge]
A word (that’s heard)
[Verse 2]
Are you waiting
(On participating)
Leave the solution
(To another’s revolution)
[Bridge]
Is your voice by choice
(Megaphone prone)
[Chorus]
Get off your seat
(And on the street)
Make a sound
(That is found)
[Outro]
A word (that’s heard)
Get off your seat
(And on the street)
Make a sound
(That is found)
Make it loud
(Be a thundercloud)
ABOUT THE SCIENCE
A megaphone does not electronically amplify sound (like a powered speaker does); instead, it
uses a simple acoustic principle to make a person’s natural voice project farther and more clearly.
It works by performing two main functions:
1. Directing the Sound (Focusing Energy)
Without a megaphone, your voice travels outward spherically in all directions. As sound waves spread out over a larger area, their energy dissipates quickly, and the volume drops off rapidly. The cone shape of the megaphone forces the sound waves produced by your mouth into a narrower, forward-facing beam. This concentrates all the acoustic energy that would normally be wasted traveling up, down, and behind you, directing it specifically toward the intended audience.
2. Matching Acoustic Impedance (Improving Efficiency)
This is the more scientific reason the megaphone works well. Sound travels best between mediums that have similar acoustic impedance (a measure of how much a medium resists the flow of sound energy).
* There is a significant difference in acoustic impedance between the high-pressure air inside your mouth and the open air of the environment.
* When sound leaves your open mouth directly into the open air, much of the sound energy is actually reflected back at you because the impedance mismatch is so high. It’s an inefficient transfer of energy.
The megaphone acts as an acoustic impedance transformer or “matching” device. It provides a gradual transition:
* The small opening is close to the impedance of your mouth.
* The large opening at the flare end is close to the impedance of the open environment.
By gradually changing the cross-sectional area, the megaphone helps the sound waves efficiently transition from high-pressure air inside the cone to the open atmosphere, ensuring more of the sound energy is successfully broadcast outward rather than being reflected back into your throat.
Summary
A megaphone makes your voice louder by focusing the sound waves into a beam and improving the efficiency with which that sound energy leaves the horn and enters the open air.
From the album “Amplification“