What is Speaking Trumpet?

This instrument is an example of the use of reflection. It is merely a bell-shaped, or flaring body, the large end of which is directed to
the audience. The voice talking into the small end is directed forwardly, and is reflected from the sides, and its resonance also enables thep. 90 vibrations to carry farther than without the use of the solid part of the instrument.

The ear trumpet is an illustration of a sound-collecting device, the waves being brought together by reflection.

Excerpt from:
Title: Practical Mechanics for Boys
Author: J. S. Zerbe

Read more

What are Infrared Rays? We cannot see infrared rays, but we can feel them as heat. It is the infrared rays in sunlight that help to make us feel warm when we stand in th...
How to make Bow and Arrow and How to make Arrows f... Authorities claim that the best materials from which to make bows are mulberry, sassafras, Southern cedar, black locust, black walnut, apple, and slip...
How to Make a Malay Kite – Homemade Kites The Malay tailless kite is probably the most practical kind ever invented. It will fly in a wind that the tail variety could not withstand, and it wil...
William Henry Fox Talbot Photography – Inven... The Talbot's Processes explained in 6.36 min video created by George Eastman House. Working in England, at the same time as Daguerre, William Henry...
Close Menu