The Difference between Audio and Soundbox
1. The difference between the whole and the part.
It is the sound that is a whole system, and the speaker is only a part of the system. It belongs to the voice equipment, and the system also includes other mixing equipment.
2. The difference between professional and amateur.
Both can make sounds. But the sound system belongs to the professional level from function to configuration. The speaker is a simple voice system consisting of one or two ordinary speakers. It's like a home theater can be called a sound, while a computer speaker is usually just called a sound box because of its simple function and low effect.
Brief introduction of speakers
A speaker is a device that converts audio signals into sound. Popularly speaking, it refers to the power amplifier in the speaker main body or the subwoofer body. After amplifying the audio signal, the sound is replayed by the speaker itself to make the sound louder.
The speaker is the terminal of the whole sound system. Its function is to convert audio energy into corresponding sound energy and radiate it into space. It is an extremely important part of the sound system, which is responsible for the task of converting electrical signals into sound signals for the ear to listen directly.
Composition of speakers:
There are many kinds of speakers on the market, but either of them is composed of two basic parts: speaker unit (terminology is called speaker unit) and box. In addition, most speakers use at least two or more speaker units to implement so-called multi-channel voice division and playback, so the frequency divider is also an essential part. Of course, there may be sound absorbers, inverted tubes, folded labyrinth pipes, reinforcing ribs/reinforcing partitions and other components in the speaker, but these components are not indispensable to any speaker. The basic components of the speaker* are only three parts: the speaker unit, the speaker body and the frequency divider.
Classification of speakers:
The classification of speakers has different angles and standards. According to the acoustic structure of the speakers, there are closed boxes, inverted boxes (also called low-frequency reflectors), passive radiator speakers and transmission line speakers. Their respective characteristics are detailed in the relevant questions and answers. Inverter box is the mainstream of the current market; from the size and placement of speakers, there are landing boxes and bookcase, the former is relatively large, usually placed directly on the ground, and sometimes also installed under the speaker shockproof nails. Because of its large volume and easy use of larger and more bass units, the floor box is usually better at low frequencies, and has a higher output sound pressure level and a strong power carrying capacity. Therefore, it is suitable for use in occasions with larger listening area or more comprehensive requirements.
Bookcase is small in size and usually placed on the scaffold, which is characterized by flexible placement and space-saving. However, due to the volume of the box and the size and quantity of the bass unit, its low frequency is usually inferior to the floor box, and its load-carrying power and output sound pressure level are smaller. It is suitable for use in a smaller listening environment. It can be divided into broadband speaker and narrowband speaker according to the narrow bandwidth of playback. Most speakers are designed to cover as wide a band as possible and belong to broadband speakers. Narrow-band speakers * commonly used with home theaters are the ultra-bass speakers (subwoofers), which are only used to restore the ultra-low frequency to a very narrow low frequency band. According to whether there are built-in power amplifiers, they can be divided into passive speakers and active speakers. The former has no built-in power amplifier, while the latter has. At present, most home speakers are passive, but the ultra-bass are usually active.
Audio Brief
Sound refers to other sounds besides human language and music, including natural environment sounds, animal sounds, machine tools sounds, human actions and other sounds. Audio includes power amplifier, peripheral equipment (including pressure limiter, effect device, equalizer, VCD, DVD, etc.), loudspeaker (speaker, speaker), mixer, microphone, display equipment and so on. Among them, the speaker is the sound output equipment, loudspeaker, subwoofer and so on. There are three kinds of loudspeakers in a speaker box: high, low and medium, three but not necessarily three. The development history of technology can be divided into four stages: electron tube, transistor, integrated circuit and field effect transistor.
Audio components:
Audio equipment includes power amplifier, peripheral equipment (including pressure limiter, effect device, equalizer, exciter, etc.), loudspeaker (speaker, speaker), mixer, sound source (such as microphone, musical instrument, VCD, DVD) display equipment and so on. Among them, the speaker is the sound output equipment, speaker, subwoofer and so on, a speaker includes three kinds of loudspeakers, three but not necessarily three.
Sound Pronunciation Principle of Speaker:
To understand the principle of speaker sound production, we first need to understand the way of sound transmission. Sound transmission needs medium (vacuum can not transmit sound); sound transmission depends on all gases, liquids and solids as media. These materials as media are called media. It's like water waves, when you throw a stone on a calm surface, there are waves on the surface, and then they travel from the other side to four weeks; that's how sound waves are formed. The frequency of sound wave can be heard by human ears in the range of 20-20,000 Hz; it can not be heard by human ears below or above this range.
Water waves and sound waves propagate in the same way. Only through the medium can the human ear hear sound.
Sound waves can propagate in gases, solids and liquids.
Now let's talk about the principle of the speaker. Horn is a device that converts electrical signals into acoustic signals. It consists of coils, magnets, paper basins, etc. The output current (AC) of different sizes from the amplifier moves the coil through the coil under the action of magnetic field. The coil is connected to the paper basin to drive the vibration of the paper basin, and then the vibration of the paper basin pushes the air to produce sound.