Correct the difference when multiple speakers occur in multiple frequency bandsĪmong the rebar equipment, there are many large speaker devices. Therefore, when clarity and intensity are required, delay processing is added instead of reverb.Ģ. Of course, the thickness of the sound can also be increased using the reverb method, but the clarity will not be so good, and the intensity will also have a certain impact. This is the most common use of audio delayers. In order to avoid this phenomenon, an audio delayer must be added before supplementing the power amplifier of the sound box, and thus extend the signal of channel B to achieve the effect of improving sound clarity. The listener at point B will hear the sound of filling the speaker first, followed by the sound of the main speaker. Since the sound propagation speed is about 340 m/s, nearly 100ms passes through when the sound is transmitted to point B. To avoid this phenomenon, the addition of a low-power make-up speaker is often used to avoid excessive sound pressure levels caused by the distance between the front and rear rows. There is a 30dB difference between the two, but in an actual sound enhancement environment, the difference in sound pressure level is even greater. If the maximum sound pressure level at point A is 100dB from the distance from the speaker, then according to the formula SPL = SPLMAX-20LGR (SPLMAX = 100db) between the sound pressure level and the distance, it can be seen that each time the sound enhancement distance doubles, the sound pressure level decreases by 6dB, and then the sound pressure level of point B, 32 meters away from the speaker (r = 32m), should be only 70dB. If the sound is amplified simply using the main speaker so that the rear audience can hear it clearly, the sound pressure level in the front row will be extremely high. In general, the outdoor sound reinforcement is relatively large, and the sound reinforcement distance is relatively long. It can be said that the use of time delay in this regard is the most commonly used. It is used to improve sound clarity during long-distance sound reinforcement So, when do you need to use delay, and for what purpose?ġ. In fact, the role of delays is not limited to that. An audio retarder, as the name suggests, is an audio device that delays sound signal processing, especially commonly used for long-distance sound reinforcement.
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