Analysis of the difference between audio and speakers
I believe everyone knows the sound and speakers. Is there a lot of friends who think that the sound and speakers are actually a kind of product? Actually not, the sound and the speaker are different. Today, Xiaobian will introduce you to the difference between the sound and the speaker.
1. The difference between the whole and the part.
The sound is a complete system, and the speakers are just a part of this system. It belongs to the sounding device, and the system also includes other mixing devices.
2, the difference between professional and amateur.
Both can also make a sound. But the sound is a professional level sound system from function to configuration. A speaker is usually a simple sound system consisting of one or two ordinary speakers. Just like a home theater, it can be called a stereo, and a computer speaker is usually called a speaker because of its simple function and low effect.
A speaker is a device that converts an audio signal into sound. In general, it means that the main body of the speaker or the subwoofer box has its own power amplifier. After the audio signal is amplified, the sound is played back by the speaker itself, making the sound louder.
The speaker is the terminal of the entire sound system, its function is to convert the audio energy into the corresponding sound energy, and radiate it into the space. It is an extremely important part of the sound system, and it is responsible for the task of turning an electrical signal into an acoustic signal for direct listening.
The composition of the speaker:
The speakers on the market are all kinds of colors, but in either case, they are composed of the two most basic parts of the speaker unit (the term is called the speaker unit) and the cabinet. In addition, most of the speakers use at least two or more. The speaker unit performs so-called multi-channel sound reproduction, so the frequency divider is also an indispensable component. Of course, the speaker may also have sound-absorbing cotton, inverted tube, folded "maze pipe", ribs / reinforcing partitions and other components, but these components are not essential for any one speaker, the most basic composition of the speaker The element has only three parts: the speaker unit, the cabinet and the divider.
The classification of the speakers is:
The classification of the speakers has different angles and standards. According to the acoustic structure of the speakers, there are closed boxes, inverted boxes (also called low-frequency reflection boxes), passive radiator speakers, transmission line speakers, and their respective characteristics are detailed. Related questions and answers. Inverted box is the mainstream of the current market; from the size and placement of the speaker, there are floor box and bookshelf box, the former is relatively large, usually placed directly on the ground, and sometimes installed under the speaker nail. Due to the large volume of the cabinet and the ease of use of larger and more woofer units, the floor box has better low frequency, higher output sound pressure level and stronger power carrying capacity, so it is suitable for listening area or more comprehensive. Used occasions.
The bookshelf is small in size and usually placed on the tripod. It is characterized by flexible placement and no space. However, due to the volume of the cabinet and the size and number of the woofer, the low frequency is usually lower than the floor box, the carrying power and the output sound pressure. The level is also smaller, suitable for use in a smaller listening environment; according to the narrow frequency band of playback, there are wide-band speakers and narrow-band speakers, most of the speakers are designed to cover the widest possible frequency band. , belongs to the wideband speaker. The most common type of narrow-band speaker is the subwoofer (subwoofer) that rises with the home theater. It is only used to restore the ultra-low frequency to a very low frequency band. According to the built-in power amplifier, it can be divided into passive speakers and Active speakers, the former does not have a built-in amplifier and the latter, most of the current home speakers are passive, but the subwoofer is usually active.
Acoustic refers to sounds other than human language and music, including the sound of the natural environment, the sound of animals, the sound of machine tools, and various sounds emitted by human actions. The sound probably includes a set of amplifiers, peripheral devices (including limiters, effects, equalizers, VCDs, DVDs, etc.), speakers (speakers, speakers), mixers, microphones, display devices, and so on. Among them, the speaker is a sound output device, a speaker, a subwoofer, and the like. One speaker includes three types of speakers: high, low, and medium, three but not necessarily three. The history of technology can be divided into four stages: electron tube, transistor, integrated circuit, and FET.
Audio equipment probably includes amplifiers, peripheral equipment (including compressors, effects, equalizers, exciters, etc.), speakers (speakers, speakers), mixers, sound sources (such as microphones, musical instruments, VCD, DVD) display devices Wait altogether to add a set. Among them, the speaker is a sound output device, a speaker, a subwoofer, etc. One speaker includes three types of speakers: high, low, and medium, three but not necessarily three.
Speaker sound principle:
To understand the principle of speaker sound, we first need to understand the way the sound is transmitted. The transmission of sound requires a medium (vacuum can not transmit sound); the sound depends on all gases, liquids, solids as a medium to spread out, these substances as a medium of transmission called medium. Just like water waves, you throw a stone on the calm water, there is a wave on the water, and then spread to the shore for 4 weeks; so is the sound wave. The frequency of the sound wave is in the range of 20-20,000 Hz, which can be heard by the human ear; below or above this range, the human ear can't hear it.
Water waves and sound waves travel in the same way. Through the propagation of the medium, the human ear can hear the sound.
Sound waves can travel in gases, solids, and liquids
Let's talk about how the speaker works. A horn is a device that converts an electrical signal into an acoustic signal. It consists of a coil, a magnet, a cone, and the like. A current of different magnitudes (alternating current) is outputted by the amplifier, and the coil is moved by the magnetic field by the coil. The coil is connected to the cone to drive the cone to vibrate, and then the vibration of the cone pushes the air to emit sound.
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