【 Weak current College 】 room decoration ([first] listening room acoustic properties of buildings)---Power By 【 China power house network 】

Audio equipment to replay sound good or bad, and listen to the acoustic properties of building environment with a very close relationship, to make the sound system to play the highest performance, must be made to the listening room acoustics certainly. For listening room acoustic properties of buildings, there are four aspects to be considered, ① ② reverberation time, reverb decay of diffusion properties, ③ room of frequency characteristics, ④ environment noise level.

Listening room acoustics of the architectural characteristics, different objects on the sound reflection and absorption also differ, so as to improve the listening environment and acoustic treatment, improve the acoustic defect work is complex. Whenever possible, it is best to avoid any room size equal on both sides, or one happens to be on the other side of double, which is the square or aspect ratio is two times the room because the ratio of the room will have a standing wave, low-frequency acoustic resonance, resulting in the sound.

Rooms from walls, ceilings, floors, furniture and personal reflection repeatedly by sound persists, gradually fading phenomenon, known as the reverb (rever beration, also known as AC-echo). It and echo (echo), ECHO is not a smooth decay rather sound suddenly returns. For indoor acoustics of the most important parameter, first, the reverberation time, it is a sound energy decay decline to original strength of one millionth (60dB) time for a determined room reverberation time depends on the absorption process. For Hi-Fi listening room reverberation time, desirable 0.4 ~ 0.5 seconds. Reverberation time appropriate to make the music go round, voice, sound reverberation time is longer than the lively fengrun, but is too long sound vague, speech intelligibility easily reduced, where music weak and rhythm, the reverberation time is too short then the sound is relatively dry, the lack of angry, no reverberation of sound (outdoor) often dull feeling.

The room has the characteristics of diffusion, sound attenuation of smooth, uniform sound sensation throughout the Interior. Any convex has the capacity of the diffusion of sound, including the slope, surface and convex cambered, when you need to spread the Sonic frequency constrained convex, spread sheet can be used for processing. If for some reason resulting in the sound of a certain frequency to get overly strengthened or weakened, will destroy the uniformity of the sound in the room, this phenomenon is called acoustic colouring (sound ation). For example, the standing wave can change sound original characteristics, spikes in certain bands, to improve the way is to avoid indoor items placed symmetry. Large space of room not only for low-frequency extension help, you can make the sound more easily, more alive. Our general use as a listening room room size is approximately 14m2, high volume about 2.8m about 40m3. In this room, as long as acoustic treatment properly, should be able to have a good sound effects. Because the wavelength of sound 100Hz following greater than 3.4m, and room size in the same order of magnitude, so the space can only produce several resonant frequency, low frequency sound waves to less interference, mellow sounds look natural. However, high-frequency sound waves in the long term is less than the space dimensions, will produce a lot of standing wave indoor, in the mutual interference of standing wave, rooms in 100 ~ 500Hz acoustics is generally poor, and the band's sound energy and very high, so to be given to the proper disposal.
The room between the walls of the relative, because the sound of multiple reflection resulting standing wave (standing waves), when the standing wave occurs can produce resonance, its frequency depends on the distance between the walls, the room is a resonator. The room have standing wave caused the largest number of acoustic colouring is speakers on either side of the back wall of a corner, it will not clean bass reflex, this effect is called room Thunder (room booming). The low frequency waves is a common cause of acoustic, bass definition, require careful handling. Control of standing wave reflection of a good approach is to use the full book bookcase books of irregular shape, and not too strong absorption effect, enable Sonic scattering, thus reducing the effect of sound reflection. Marble and granite floors and floor glass is the first choice for the modern home decoration, but it is the sound effect enemy. Often resulting in the sound of fuzzy noisy, improvement of the method is to place the front speakers the proper size of carpet and the glass with thick curtains.

Ambient noise level means indoors no sound sources of noise sound pressure level, such as environmental noise is too high, you can take, such as sound, vibration isolation, or in the indoor laying a sound-absorbing materials. For current bedroom acoustics usually is not enough, and the entire room in a solid wall of the best sound insulation, doors, Windows and sound insulation of the weakest, so I decided to Atrial Septal sound quality of the important factors are the doors and Windows. Bedroom living room as a room is not ideal, because general living room is an open space, the aisle had the space of asymmetry, plus the French cause low-frequency loss, extension of space so that the sound reflection does not control, resulting in the sound image offset. As long as there is no too much furniture for the bedroom listening room is the better choice, because of the confined space easily mastered sound reflection.