Shijiazhuang professional audio teaches you sound shock absorber

Release time:

2019-08-29

Summary： The vibration sources that affect the audio equipment are driving motors, transformer magnetic induction, speaker playback sound waves, etc. In order to avoid the impact of vibration on the equipment playback sound, in addition to the equipment itself to take shock-absorbing, shock-absorbing measures, a variety of shock-absorbing equipment also came into being, and a wide variety, but generally there are two categories of hard pyramid nails and soft shock-absorbing pads, can further eliminate the impact of vibration on audio equipment.

Vibration has an effect on sound playback. Vibration can also be avoided. The problem we are doing now is how to shock absorber! follow the shijiazhuang professional audio to see it!

The vibration sources that affect the audio equipment are driving motors, transformer magnetic induction, speaker playback sound waves, etc. In order to avoid the impact of vibration on the equipment playback sound, in addition to the equipment itself to take shock-absorbing, shock-absorbing measures, a variety of shock-absorbing equipment also came into being, and a wide variety, but generally there are two categories of hard pyramid nails and soft shock-absorbing pads, can further eliminate the impact of vibration on audio equipment. Shock-absorbing equipment made of various shapes and materials can conduct, isolate and absorb certain frequencies of vibration in the audio equipment itself, the carrier (ground or table) and sound waves, thereby eliminating the impact of vibration on sound.

In nature, each object has its inherent resonance frequency, each material due to their own density is different, their inherent resonance frequency is not the same, the transmission performance of each vibration frequency is different. Therefore, for shock-absorbing equipment, the selection of the physical properties of the material is crucial. At present, the materials for making shock-absorbing equipment can be roughly divided into five types:

① High elastic coefficient low damping materials, such as aluminum alloy, stainless steel and ceramics, the peak shape of this material is sharp, near 40Hz vibration

The transmission capacity varies greatly with frequency, and the transmission capacity is higher than that of soft materials at high frequency;

The vibration transmission capacity of damping materials in the middle elastic coefficient, such as wood, is between metal and rubber;

③ The transmission capacity of low elastic coefficient and high damping materials, such as rubber, fluctuates with the frequency near 200Hz;

Ultra-low elastic coefficient materials, such as sponges, etc., the transmission capacity of vibration decreases steadily with the increase of frequency, and has no effect on the change of frequency.

Large, but not easy to transmit high-frequency vibration;

Composite materials, such as stainless steel and rubber, have the advantages of both the transmission capacity of vibration.

Foot nails, tripods, etc. are the use of appropriate media and geometric shapes to minimize the contact surface of the audio equipment shell and the carrier, creating an acoustic high impedance zone, so that isolation, or the vibration of the audio system "mechanical grounding". In addition to the vibration of the equipment itself, the hard pyramid foot nail can also block the vibration of the equipment from the outside world, so that the influence of the internal and external vibration of the audio equipment on the sound quality can be reduced. An effective shock-proof foot nail must conduct vibration at the same time, the vibration of the mechanical energy into heat energy to dissipate. Pyramid pins made of different materials have their fixed resonant frequencies, each with their own advantages and disadvantages, which should be considered when used.

The shock-absorbing pad is used to absorb the vibration of the equipment. Due to different materials, the shock-absorbing pad, rubber pad, plastic pad, fluff pad, etc. can be distributed. In order to achieve good shock-absorbing effect, the shock-absorbing pad that can absorb the frequency range causing the main interference should be selected. At the same time, the ultra-low frequency (below 10Hz) below the audible frequency should be absorbed to improve the sound clarity. The shock-absorbing pad is especially suitable for LP turntable and CD player. The effect can be described as immediate. For example, after the shock-absorbing pad is placed under the CD player, the replay sound quality will be significantly improved, the bass will be tighter, the sound image will be better focused, and the human voice will be clearer. The shock-absorbing pads made of different materials have different frequencies and conduction velocities for vibration conduction, which is the key to selection. Such as heavy stone as the bottom, and then put on it with soft shock-absorbing rubber pad, can have a better effect.

The combination of pyramid and shock-absorbing pad can take up the length of both. The hard pyramid enables the vibration to be effectively transmitted. When the vibration is transmitted to the shock-absorbing pad, the mechanical energy of the vibration is converted into heat energy due to the mutual collision between the molecules of the high-damping sandwich material. The energy of the vibration will not accumulate near the cone. Moreover, different materials have different resonance frequencies and different damping characteristics for different frequencies, this combination can have a wider frequency band of absorption and damping, so as to receive a better effect.

With regard to the use of pyramid nails, according to many experiences, because the vibration amplitude of each point on the material is different, when the pyramid is placed at the bottom of the audio equipment and moves back and forth, the effect is different. Usually three pyramid foot nails are used and placed in a triangle. The best position is obtained by experimental methods. The effect of pyramid foot nails is most obvious in CD player and speaker.

When pyramid nails have not yet been commercialized, audio enthusiasts often use inverted high-foot glass glasses or drum-shaped elephant chess pieces under the equipment as shock absorbers, which can also receive the same effect.

Sound equipment shock absorber can usually be attributed to two, one is the use of solid wooden cabinet or metal cabinet placed equipment as a support, the other is the use of nails, shock-absorbing pads or other things, the equipment and the support frame, and the support frame and the ground for isolation.

The above is how to sound shock absorber method! Shijiazhuang professional audio reminds you that not all shock absorbers are suitable for every sound, and we should also carry out shock absorbers in combination with the actual situation!

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