A loudspeaker is a device that converts electrical signals into acoustic signals, and what is it mai

The speaker is composed of an electromagnet, an electric coil, and a horn film. The speaker converts the frequency of the current into sound. The principle of physics is that when an electric current passes through a coil to produce an electromagnetic field, the direction of the magnetic field is the right-hand rule.

Suppose that the frequency of the speaker is 256Hz, that is, it vibrates 256 times per second, and the speaker outputs 256Hz alternating current, and the current changes 256 times per second, and the frequency of C is emitted. When an electrical coil vibrates with the speaker film, pushing the surrounding air to vibrate, the speaker produces sound.

Fixed permanent magnets, coils, conical paper cones.

The speaker is composed of an electromagnet, an electric coil, and a horn film.

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Electric speakers are the most widely used, and they are divided into three types: paper cone type, horn type and dome type. Only the first two are covered here. 1. Paper cone speaker Paper cone speaker is also known as dynamic speaker.

It consists of three parts: a vibrating system, including a conical paper cone, a voice coil and a centering piece; Magnetic circuit system, including Yongyi magnet, magnetic guide plate and field column, etc.; Ancillary systems, including basin racks, power strips, crimping and dust covers, etc. When the voice coil in the magnetic field has an audio current through, it produces a magnetic field that changes with the audio current, and this magnetic field interacts with the magnetic field of the permanent magnet to make the voice coil vibrate along the axial direction, because the speaker structure is simple, the bass is full, the sound quality is soft, and the frequency is wide, but the efficiency is low.

2. Horn speaker The structure of the horn speaker, which is composed of two parts: the vibration system (tweeter) and the horn. The vibration system is similar to that of a paper cone speaker, except that its diaphragm is not a paper cone, but a spherical dome-shaped diaphragm. The vibrations of the diaphragm radiate sound waves into the air through the horn (after two reflections).

It has a high frequency and high volume, and is often used for outdoor and square field sound reinforcement.

There is an electromagnet inside the speaker, and under the action of the electrical signal, the magnetic magnitude of the electromagnet will change, which will drive the speaker and other devices to vibrate, thus emitting sound.

) is a conversion device that converts electrical signals into sound signals, and is the terminal element of the audio system.

Hello, the above questions will be answered by me. A speaker is a conversion device that converts an electrical signal into a sound signal, and is a terminal element of a sound system. A loudspeaker is an electro-acoustic conversion device that converts electrical signals into sound, and is the terminal element of car audio.

Car audio generally uses electric, external magnetic round or oval speakers, and the general resistance value is 4. Hope it helps!

Answer]: B is a test of the basic knowledge of socks.

Sound is a continuous wave that travels through the air called a sound wave. Sound waves are continuous analog signals in terms of time and amplitude. The audio signal is mainly an analog sound (audio) signal that can be heard by the human ear, and the signal that the audio signal is processed by the computer system and sent to the speaker is an analog signal.

Answer]: B This question tests the basic knowledge of many **.

Sound is a continuous wave that travels through the air called a sound wave. Sound waves are continuous analog signals in time and amplitude. The audio signal mainly refers to the analog sound (audio) signal that can be heard by the human ear, and the signal sent to the speaker after the audio signal is processed by the computer system is the analog signal.

Sampling and encoding is the process of converting analog data into a digital signal.

Answer]: B This question tests more basic knowledge.

Sound is a continuous wave of an acre of mountain species that is transmitted through the air, called sound waves. Sound waves are continuous analog signals in time and amplitude. The signal in the sound fraud bright frequency is mainly an analog sound (audio) signal that can be heard by the human ear, and the audio signal is processed by the computer system and sent to the speaker, and the signal is an analog signal.

The speaker is a device that converts electrical signals into sound signals, when the coil passes through the alternating current, the coil is attracted or repelled by the magnet, and the direction of movement of the coil is constantly changing, generating vibration and driving the paper cone to vibrate back and forth, so the electrical signal is converted into a sound signal, so it is made according to the principle that the energized conductor is moved by force in the magnetic field

So the answer is: electricity; Sound; An energized conductor moves under force in a magnetic field

a, the microphone is a commonly used sound sensor, its function is to convert the sound signal into an electrical signal so a wrong b, the earpiece is a commonly used sound sensor, its role is to convert the electrical signal into an acoustic signal, so b is wrong;

c, the electronic scale used the force measuring device is a force sensor, the voltage output of the sensor indicates the size of the force f, the greater the pressure, the greater the number of electronic scales, that is, the greater the output voltage, so c is correct

d. The sensor is a device that converts other forms of signals into electrical signals, so D is wrong and C is selected