What is the megaphone used for, how is the megaphone used

A loudspeaker is a device that amplifies sound and travels farther.

The megaphone was invented in 1950 and is not only limited to the loudspeaker, but is now divided into wireless amplifier and wired amplifier. Loudspeakers come in different sizes and have their own uses.

The sound penetration of the amplifier is stronger than that of the speaker. According to the way of use: it can be divided into wired amplifier and wireless amplifier; According to the use of use: it can be divided into teaching amplifiers, tour guide amplifiers, and entertainment amplifiers.

As the name suggests, the amplifier is to amplify the sound and spread farther, and the sound penetration of the amplifier is stronger than that of the speaker. It is mainly used for teaching, tour guides, and outdoor activities.

Amplifiers can be divided into various types according to their size, use and use, each with its own advantages. Due to the limitation of shape and speaker, the general power of portable amplifiers is only 3-8W. The wireless amplifier and the wired amplifier are different in size and size, and the use is different, the smaller one is suitable for teachers and tour guides, and is hung on the waist to make the hands play more freely, and its power is generally 3w-8w.

The large volume is suitable for outdoor activities, summer camps, extracurricular speeches and other places with a large amount, and the power is 35W---95W. Lithium-ion amplifiers are classified according to the type of battery they use. It solves the problem of environmental pollution caused by traditional dry batteries, and it mainly uses mobile phone lithium battery technology to power the amplifier.

The amplifier should be worn first, so that the speaker of the amplifier is at a distance from the microphone, and the microphone of the amplifier should be facing the mouth, not opposite the speaker. Don't turn the volume to the maximum at once, usually we only need to turn on half of the sound, so as not to affect the students in the front row to listen to the class, and the volume is more likely to cause howling.

When using it, it is best not to use it in a small space, not too close to the wall. If you don't know the front of the microphone, you can remove the windproof sponge, look at the direction and put it back on.

The simplest and most convenient neckband wireless microphone, equipped with a dedicated wireless receiver amplifier and speaker, the microphone can be used immediately, it is very simple, the teacher just remember to charge the wireless microphone in time.

There are a total of 4 buttons, all of which are written with functions.

Look at the words on it when the button pops up, and look at the words below when the button is pressed.

For example, the first button on the left, press to turn on, and pop up to turn off. After turning on the machine, the other three keys all pop up, and you can shout.

The round hole on the top is the shouter (microphone).

You can check the instruction manual online according to your loudspeaker model.

Put on the battery, turn on the switch, and you're ready to go.

If you want to install a battery or charge, just shout when a switch is turned on.

How to use a megaphone correctly1.When using the microphone, you should wear the microphone first, so that there is a certain distance between the microphone speaker and the microphone. The microphone head should be facing the microphone mouth, not the speaker.

2.You can turn the volume up to the maximum at a time, usually only half the time. When the volume is turned on, it is more likely to cause Bu Chiliang to howl.

3.It is best not to use it in small spaces or near walls.

A loudspeaker is an electronic device whose main function is to reduce the diffusion of sound, amplify the input sound, and make the sound travel farther.

The amplifier is mainly composed of iron, paper, magnets, and copper wires, and the working principle is that the audio communication signal of the coil interacts with the magnet electromagnetically, and the surrounding air emits sound, and the amplifier can be divided into wired amplifier and wireless amplifier.

Wired amplifiers are mainly used for small conferences, field tourism activities, tour guides, commodity promotion, auctions, etc., and are divided into two categories: waist-mounted amplifiers and handle-mounted amplifiers. The most basic feature of the wireless amplifier is the wireless transmission mode of the sound signal, the sound signal is transmitted through the carrier wave, and the process of being received by the receiving end is called the wireless transmission of the wireless amplifier.

Traditional loudspeaker generally refers to a device or item that amplifies the original sound energy, and making a cavity has the effect of sound reinforcement, which is also called a loudspeaker, not only refers to the cavity of electronic sound reinforcement products.

Nowadays, the microphone (microphone), power amplifier and speaker integrated into one product are formed by the megaphone, and tens of millions of teachers and tour guides in China demand more such products, so the loudspeaker that everyone talks about is the amplification equipment (also called the little bee).

When the coil in the speaker is energized, the coil will produce a magnetic field, and under the interaction with the magnetic field of the magnet, the coil will vibrate, and the vibration will produce a sound, which is the force of the sailor in the magnetic field of the energized conductor. When an AC audio current passes through a speaker's coil (voice coil), a corresponding magnetic field is generated in the voice coil. This magnetic field interacts with the magnetic field generated by the permanent magnets that come with the speaker.

This force causes the voice coil to vibrate with the audio current in the magnetic field of the speaker's own permanent magnets. The diaphragm of the speaker and the voice coil are connected together, so the diaphragm also vibrates. The vibration produces sound that is the same waveform as the original audio signal.