What kind of acoustic material is good?

What kind of acoustic material is good?

 

Acoustic Sound Absorption Wooden Panel For Interior Wall Decoration.jpgGood acoustic materials should be able to withstand the detection of three indicators. The first is the noise floor, also known as background noise. The studio has the highest requirements for this indicator, and it must be absolutely quiet, because the professional microphone is very sensitive, and any subtle sound in the room can be picked up. Absolutely quiet and quiet in feeling, the indoor background noise is less than 30dBA, and the strict professional recording studio is less than 20dBA. What is this concept? In a closed room far from the downtown area, even in the quietest hours, there will be wind, birds, and electrical appliances next door. These noises add up to about 40-60dBA.


Second, the frequency response curve. The same person speaks in different rooms, the sound may be very different, some rooms sound loud and sound, some rooms feel sharp and harsh, and when these rooms are full of furniture, the sound is not so stuffy or not so Sharp. This is the effect of the room on the sound. A good acoustic environment requires a flat frequency response curve. This room will not absorb too much treble or bass, high and medium bass equalization, no treble and low bass, or low bass and high treble.


Third, the reverberation time. If the reverberation time is too long, the sound in the room becomes turbid and weak, and too short a sound will lose its vitality. What is the reverberation time? For example, many people like to sing in the bathhouse, because the reverberation time is long, the original sound is wrapped, and it plays a "beautified" sound.