What environmental factors affect the sound playback?

When we are tasting the sound quality of a set of sounds, we are most concerned about the hardware factors such as electronic equipment, speakers, wires, etc. In fact, there are many other factors that are not easy to be perceived by us; the sound of the speakers is returned, the external vibration, and the resonance of the listening environment. The acoustic characteristics of the listening room.
Horn sound feedback:
When listening to the sound, the sound waves emitted by the speakers will vibrate the walls, the roof and the ground, and some even directly or indirectly impact the audio equipment. These vibrations are transmitted through different channels; for example, audio racks, air, etc., with different speeds and strengths. The feedback to the equipment causes the equipment to vibrate and generate its own resonance, which causes the sound system in operation to produce subtle changes in the electronic flow of the electronic circuit to change the sound, causing the sound to be slightly blurred and causing slight distortion.
Resonance characteristics of the environment:
The object has its own resonant frequency according to the material, shape and size. When the external vibration energy is applied to the object, if the frequency is equal to or close to its resonant frequency, the object will vibrate synchronously to become a resonance.
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 the spectrum test analyzer is used for testing, the frequency response characteristic curve of the room will be undulating like a dragon dance, no matter the audio equipment you use. How advanced, will be subject to the acoustic characteristics of this room. Resonance is harmful in most cases, it increases noise and accelerates fatigue damage to the equipment.
Is there any way to eliminate or reduce the natural resonance of the listening room, making the frequency response flat, and the sound system has excellent sound? This is that the physical properties of the object cannot be eliminated and can only be weakened. For example, a rectangular room is easier to handle resonance, and a square room produces a standing wave that is particularly difficult to handle. There are also enthusiasts who believe that the triangular near-field listening can also reduce the effects of low-frequency resonance.
External shock factors:
If the listening room is adjacent to the roadside, factory, construction site, elevator room, pump house, etc., it is very susceptible to noise or ultra-low frequency interference, and the sound equipment is blurred due to vibration.
If you hit such a problem, you will either relocate or use a simulated studio design to make a hollow room isolated from the house and make sound insulation measures to reduce or eliminate the effects 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 used in the construction of the listening room, decoration materials, arrangement, standing waves, acoustic reflection, and acoustic diffraction. A sofa and a curtain will change the frequency characteristics of the original listening room. Some simple changes can be predicted or calculated, but more complex ones are based on professional measurements.
If there is a change in the entry after the listening room, its acoustic characteristics will also change, and even affect the placement and adjustment of the sound system, the increase or decrease of the arrangement 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. Use furniture and decorations that have little impact on sound, and use professional materials such as RGP board, Room Ture, Sonex, diffuser board. To adjust the acoustic characteristics of the room.
The sound is very sensitive. Due to the limitations of human physiological characteristics, we often cannot capture some sound details and changes. To achieve the ideal sound reproduction, using acoustic instruments to measure and adjust some one-sidedness, combined with personal listening habits, find the right balance in the sound playback and environmental noise effects of audio equipment, and call out the favorite or cater to the masses. sound. This is a very difficult problem, so the "golden ear" is important.

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