When we appreciate the sound quality of a set of audio, we pay most attention to hardware factors such as electronic equipment, speakers, and cables. In fact, there are many other factors that are not easily detectable by us, such as speaker sound feedback, external vibration, and listening environment. Resonance, the acoustic characteristics of the listening room.
1. Speaker sound feedback:
When listening to audio, the sound waves emitted by the speakers will vibrate the walls, roof and ground, and even some of them will directly or indirectly impact audio equipment. These vibrations go through different channels; for example, audio racks, air, etc., at different speeds and intensities. Feed back to the equipment, causing the equipment to vibrate and produce its own resonance, resulting in subtle changes in the electronic circuit of the sound system in operation, which changes the sound, making the sound slightly blurred and slightly distorted.
2. Resonance characteristics of the environment:
Objects have their own natural resonant frequency according to their material, shape, and size. When external vibration energy is applied to the object, if the frequency is equal to or close to its resonant frequency, the object will vibrate violently and become resonance simultaneously.The resonance of the listening environment is more complicated. If the music frequency is close to the natural frequency of the room, resonance will occur. If you use a spectrum test analyzer to test, the frequency response characteristic curve of the room will fluctuate like a dragon dance, regardless of the audio equipment you use. How advanced is bound to the acoustic characteristics of this room. Resonance phenomenon is harmful in most cases, it will increase noise and accelerate the fatigue damage of equipment. Is there any way to eliminate or reduce the natural resonance of the listening room so that the frequency response is flat and the sound system has excellent sound? This is because the physical properties of the object cannot be eliminated but can only be weakened. For example, a rectangular room is easier to deal with resonance, while a square room will produce standing waves which are particularly difficult to deal with. There are also audiophiles who think that equal-triangular near-field listening can also reduce the effects of low-frequency resonance.
3. External vibration factors:
If the listening room is close to roadsides, factories, construction sites, elevator rooms, pump rooms, etc., it is very susceptible to noise or ultra-low frequency interference, and the audio equipment is subject to vibration and the sound is blurred.If you encounter this kind of problem, you should either relocate or design an analog recording studio to create a hollow room that is isolated from the outside and take sufficient sound insulation measures to reduce or eliminate the impact of external vibration.The acoustic characteristics of the listening room include not only the proportion and size of the room, but also the reverberation caused by the materials, decoration materials, layout, standing waves, sound reflection, and sound diffraction used in the construction of the listening room. A sofa and a curtain will change the frequency characteristics of the original listening room. Some simple changes can be predicted or calculated by themselves, but more complex ones rely on professional measurements.If there is a change in the listening room afterwards, its acoustic characteristics will also change accordingly, and even affect the placement and adjustment of the sound system, and the increase or decrease in the layout of reflective or sound-absorbing materials. Therefore, it is recommended that enthusiasts should also consider the acoustic characteristics of the room when placing and adjusting the sound, and use more furniture and decorations that have little effect on the sound, and use professional materials such as RGP boards, Room Ture, Sonex, and diffusers. To adjust the acoustic characteristics of the room.
Sound is very sensitive. Due to human physiological characteristics, we often fail to capture some sound details and changes. To achieve the ideal sound reproduction, it is somewhat one-sided to measure and adjust with acoustic instruments alone. It is necessary to combine personal listening habits to find an appropriate balance between the sound playback of audio equipment and the impact of environmental noise, and call out what you like or cater to the tastes of the public. sound. This is a difficult problem, so "golden ears" are important.
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