Taixing Yangsheng Electronic Co., Ltd >> News >> The main technical characteristics of the speaker and its application

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The main technical characteristics of the speaker and its application

[Author:admin] [Date:14-04-15] [Hot:]

Speaker (or speaker) is the mouthpiece of the sound system, a direct impact on the quality of playback is the most critical part of the sound system is one.

      Speaker's power is to a kind of audible within the scope of the audio signal through the transducer (speaker unit) into sound pressure level of audible sound sufficient. How can we more shovel it to complete the conversion? One must first understand the properties of sound signal, followed by the speaker to understand and be familiar with the main technical characteristics, correct choice of a good speaker.

      Sound signal attribute mainly refers to the human voice, music and various sound effects. These sound signals are a random signal, its waveform more complex, but the case of the human ear audible sound frequency range (20Hz ~ 20kHz), in which the human voice spectrum range of about 150Hz ~ 4kHz; all kinds of music, the spectrum of reference can be up to 40Hz ~ 18kHz. The average spectral energy distribution as follows: bass and the bass part of the largest alt part of the second, pitch some of the smallest (about the bass part of the energy of the 1 / 10, voice of the energy is concentrated in the frequency range of 200Hz to 3.5kHz) . These can be Wensheng random signal amplitude of the peak is larger than its average out of 10 ~ 15dB. Therefore, to be able to correctly re-release of these random signals, ensuring playback signal quality beautiful sounds, speakers must have a broad frequency response characteristics, adequate sound pressure level and the signal dynamic range, and has a highly efficient electric power conversion into sound pressure sensitivity.

      Speaker system comes with a lot of occasions with the sound effects and the use of technology directly related to the special health, use the handy features of living of these technologies, we must have some knowledge of them.

Divider Systems

      Radio, film, television, theater, ballroom, conference halls, sports venues to use sub-frequency loudspeaker system, there were (Rd) 2 sub-frequency, (3 Road) three-way systems. Audio signal bandwidth from 20Hz ~ 20kHz, with a single speaker unit is unable to meet the entire band of frequency response, in other words, use of a loudspeaker unit to the frequency of 20Hz ~ 20kHz playback is overwhelming even impossible. For example, a 12-inch diameter speaker unit, low-frequency characteristics of a good, little distortion, but more than 1.5kHz signal, its ability to respond to very bad. On the contrary, 2-inch-diameter speaker unit, playback of the audio signal response to the above 3kHz good, they can not sustain and bass in the playback signal. So must be from a variety of frequency response of the loudspeaker system modules to complete the task of the broadband segment of audio playback. For example, from the bass, treble two-unit composed of two-way speaker system consisting of bass, medium sustain and treble three kinds of units consisting of three-way speaker system. 2-way speaker system structure relatively simple, but in less than ideal frequency response. In order to solve the frequency response, manufacturers adopted a compromise, the bass frequency response characteristics of units to move up, but the tweeter's frequency response characteristics of the down, think of a way crossover point set at between 400Hz to 1500Hz ( Figure 1 is a high-frequency response for low-frequency unit down, move up the results). Crossover crossing often subsidence phenomenon, the actual application of information provided in accordance with manufacturers in the sub-frequency part of the use of cross-point equalizer to enhance the light of actual needs. Figure 1 crossing point in 400Hz.


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