Megaphone's Principle

The working principle of a megaphone involves three main steps: sound acquisition, electrical energy conversion, and sound energy output.

Sound Acquisition: The megaphone captures sound wave signals through a microphone or other sound sensors. The microphone converts sound fluctuations into electrical signals. When sound waves reach the microphone, its vibrating element senses the waves and converts them into electrical signals.

Electrical Energy Conversion: The processed sound signals are sent to the megaphone's amplifier. Upon receiving the sound signals, the amplifier converts them into more powerful electrical signals. This is typically achieved using various circuits and electronic components (such as transistors, integrated circuits, and capacitors) to increase the energy and amplitude of the sound signals.

Sound Energy Output: The electrical signals processed by the amplifier are sent to the megaphone's loudspeaker. The loudspeaker converts the electrical signals into sound energy signals. When the electrical signals reach the loudspeaker, its internal vibrating elements (such as the diaphragm or voice coil) produce vibrations, generating a sound wave corresponding to the sound signal. This sound wave, with the special design of the loudspeaker and the gain of the amplifier, can propagate in outdoor or large venues and provide sufficiently loud sound.