How to protect ears in the environment of monitoring entertainment audio?Bar private room audio Vend

　　Be able to confirm the monitoring volume on the sound card. Before adjusting the monitoring volume to a lower level, and before wearing the monitor headset, play a piece of audio to listen to the sound from the headset, and then put it on after confirming that the sound is not too loud; these two The guidelines can prevent such problems to the greatest extent. In many cases, we cannot predict how loud the next audio will be, whether the music software and audio equipment will malfunction, whether the monitoring volume on the sound card will be reset to 0dB due to other circumstances, and so on.

　　It's easy to turn up the low volume, but it's too late to turn down the volume after you hear the "boom". Compared to the damage to your hearing, burning a speaker is a trivial matter.

　　Listening volume:

　　When using monitor speakers, the monitor volume should be lower than the standard monitor sound pressure. The standard monitoring sound pressure of the entertainment sound that can be heard in the mixing studio is 85 dB SPL. This loudness is more used for final inspection works. In actual work, in order to reduce auditory fatigue, it will probably work between 70-75 dB. A bear kid screaming at a distance of one meter has a sound pressure of about 85 dB. The monitoring sound pressure of 85 dB does not sound very noisy. Many people usually increase the volume unconsciously when they are interested in listening to a song. Watch out it is easy to overtake.

　　The sound pressure level can be measured with a sound pressure meter or similar APP on the iPhone. After the test, you will probably know where to adjust the monitor volume on your sound card. The output volume is about 85 dB. Remember In this position, do not usually let the output volume exceed this position.

　　Use the monitor speakers to work, every hour of continuous listening, at least five minutes to get up and move, not only for the ears, but also for the health of the body. When you are in the shed, you may have to work continuously for 8-12 hours a day. Combination of work and rest is necessary. Long-term continuous monitoring is more likely to cause auditory fatigue, affect the accuracy of sound judgment, and reduce efficiency.

　　Monitor earphones are more prone to fatigue than monitor speakers. Not only are there normal listening fatigue, but also the weight of the earphone itself, the pressure of the earphone spring and other factors. I personally think that the fatigue point of listening to music with earphones is about an album, that is, it is not. More than 50 minutes. If you use headphones for more than 4 hours a day, if conditions permit, you should try to use speakers.

　　Try it out if the sound is good or bad! Explain the professional audio debugging method in detail

　　Professional audio debugging-system boot

　　Turn on the power of the mixer first, then turn on the peripheral power, and finally turn on the power amplifier (power amplifier). Push the input channel fader of the mixer to 2/3, the input channel gain to 4/5, the master fader to about 0dB, and listen to the static noise of the entire sound reinforcement system. If the total static noise is large, Open the noise gate of the compressor until the noise is slightly audible, pull down the master fader, input the sound signal, and push up the master fader of the left and right channels to play the sound.

　　Professional audio debugging-adjusting electronic crossover

　　Turn off the high-frequency power amplifier first, and adjust the crossover frequency at the low end of the crossover. When the frequency is adjusted to a certain point, the woofer and midrange speakers can pronounce moderately. Fix this frequency as the low end crossover frequency. Then, turn off the low-frequency power amplifier, turn on the high-frequency power amplifier, and adjust the high-quality crossover frequency of the crossover. When the frequency is adjusted to a certain point, the midrange speaker and tweeter will produce moderate sound. Fix this frequency point as high-quality Crossover frequency. The electronic crossovers of the left and right channels of the main amplifier system should be adjusted as described above.

　　Professional audio debugging-adjust the compressor

　　When used as a compressor, adjust the compression threshold, compression ratio, start-up time and recovery time according to listening needs. For music with too much dynamic fluctuations, such as symphony, the compression ratio should be increased, and the start-up time should be shortened and the recovery time Longer. In order to make the level signal stronger, the compression threshold can be increased. During the adjustment process, it should be noted that the start-up time and recovery time cannot be adjusted too small, otherwise a "gasp" effect will occur. The compressor is used as a limiter and the compression ratio is ∞:1. At this time, the compression threshold becomes the limit threshold The adjustment of the threshold should not be too large, otherwise the power amplifier and speakers will not be protected, and it is generally adjusted until the sound amplification is sufficient. Change the compression threshold and adjust it to the scale that just affects the volume of sound reinforcement.

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