【 Weak current College 】 discotheque sound reinforcement of---Power By 【 China power house network 】

In recent years, with the standard of living of our people, culture, entertainment, disco music, with its evocative melodies, fantasy style, attracts large numbers of young people. Disco mushroomed in China, its size is bigger, audio equipment grades also getting higher and higher, but due to a design or abuse often cause some acoustic defect and damage to the audio device.

First, the PA of high dynamic due to a discotheque, large loudness of playback, in order to protect the power amplifier and speakers that are generally limited in their previous compression to reduce the dynamic music, limit the output level, which can effectively protect the safety of the electro-acoustic devices. But if you are debugging, press the device does not work, amplifier and speakers will still be due to excessive signal and the moment of impact damage or excessive due to compression reduces the dynamic range of music, the sound moves. Now only disco in sound reinforcement points of general readers.

1. compression ratio setting in disco If compression is set too small, no compression marks; if compression is set too large, it will cause music dynamic range narrowed, sound, dry and tasteless. In the discotheque sound reinforcement in compression ratio set in 2: 1 to 10: 1, can guarantee the music signal compression in sound reinforcement system of dynamic range, to avoid overload distortion, to ensure that disco music shocking.

2, rise time of adjusting the rise time of adjustments mainly consider the characteristics of the music. If you rise time too fast, to a certain extent affect the disco music tone head of dynamic and intensity; if the rise time is too slow, and affect the level and nature of the music of the moment. Therefore, the rise time shall be selected among the 20 ~ 80ms.

3, the recovery time of adjusting general recovery time is slower than in the compresses time to ensure that the music does not produce a sense of health jump if recovery time selected is too long will affect the next music signals in a normal state. General discotheque in normal playback, recovery time should be selected between 300 ~ 700ms. Due to the disco music rhythm and speed, so the rhythm in around 100 beats per minute can be slightly longer, the rhythm in approximately 125 beats per minute can be slightly shorter, depending on the specific set of characteristics of music for reasonable adjustments.

2. use the Equalizer should pay attention to problems in the construction of a disco or by the original construction modifications, to the pursuit of design distinctive, often causing some acoustic defect, this requires passing frequency equalizer to compensate for a variety of acoustic sound at the venue. Equalizer general schema equalizer, parametric equalizer and digital equalizer, etc.

1. in order to pursue high sound pressure and strong shocking, often on low-frequency to upgrade, but you should note this paragraph 20 ~ 40Hz should not be promoted, excessive upgrade easily voice cloudy, or have an impact on the speaker.

2, the attention in the adjust equalizer, to avoid a second band produces larger phase shift, so that the voice of strange, you should try to make it smooth transition.

Third, the speaker of a substantial and discotheque in order to obtain a greater sound pressure level, generally using multiple groups of loudspeakers in sound reinforcement. Therefore, the speaker placement is very important. If placed properly can lead to acoustic interference phenomenon, there is a general public places, but the audio interference should be avoided by acoustic defect it brings. The following talk about disco speaker placed. General sound reinforcement speaker placed in a centralized and decentralized.

1. centralized in discotheques do not apply. For front and rear sound field with uniform loudness, direct sound not of sound intensity and sound source to the square of the distance guests dance inversely, dance off from farther away, the more sound the sound source, it will cause light front volume, close to the speakers after the field when the deafening; some distance, the sound is reduced considerably. In addition, direct sound was screened front groups, absorbed a lot, and high-frequency components and more bass more easily absorbed, leaving after only vague mix sound and bomb the bass.

2, decentralized placed is not, speaker settings in dance halls around acoustic field uniformity, anywhere within the Ballroom can be a lot of noise, basically any location has direct access to the sound.

In addition, disco application Mono playback, LD, CD, LP and tape are two-channel stereo, left and right speaker emits sound is different, dance who stood in the vertical position, two ears can simultaneously receive two different sounds to produce the correct stereo sound and image, but disco dancer who is not a station on the vertical line in fixed and moving around, this is as close to the right speaker, at which point the right speakers representing the voice of the left speaker to your ear before and loudness, sound like just to offset the speaker orientation, it just goes to show if you use stereo playback, only in the vertical line can hear the full music sound, while the left is the voice of the speakers on the left, the right is the right speakers sound. If you use the Mono playback does not have the above problems can be uniformity good sound field.