Loudspeaker

👉 The Bible states about Cry aloud lift up thy voice put trumpet in your mouth the Prophets of God foreseen the concept of using loudspeaker:

In Hosea 8:1 “Put the trumpet to your lips! Like an eagle the enemy comes against the house of the LORD, Because they have transgressed My covenant And rebelled against My law.

---

In Isaiah 58:1 “Cry aloud, spare not, lift up thy voice like a trumpet, and shew my people their transgression, and the house of Jacob their sins.

What is Loudspeaker?

Loudspeaker, also called Speaker, in sound reproduction, device for converting electrical energy into acoustical signal energy that is radiated into a room or open air. The term signal energy indicates that the electrical energy has a specific form, corresponding, for example, to speech, music, or any other signal in the range of audible frequencies (roughly 20 to 20,000 hertz).The loudspeaker should preserve the essential character of this signal energy in acoustical form. This definition of a loudspeaker excludes such devices as buzzers, gongs, and sirens, in which the acoustical signal energy does not correspond in form to the electrical signal. The part of the speaker that converts electrical into mechanical energy is frequently called the motor, or voice coil. The motor vibrates a diaphragm that in turn vibrates the air in immediate contact with it, producing a sound wave corresponding to the pattern of the original speech or music signal. Most frequently the motor consists of a coil of wire moving in a strong magnetic field, but the diaphragm may also be operated by electrostatic forces or by the action of a piezoelectric material.