Buying Guide・2016-02-27

【Acoustics】Please Give Me Acoustic Transmission Gain, This Is the True Source of Customer Value!

Industry Insights Download PDF [Written by / Vice President's Office]

Have you ever wondered why the exact same microphone, when plugged into two different sound systems, causes feedback at a very low volume on one, but is highly resistant to feedback even at high volumes on the other? What is influencing this? As an electroacoustic system, if it cannot provide sufficient volume and resolve feedback issues, customers will certainly not buy it! But to achieve this, we need to understand this physical principle!

This term is known internationally as Potential Acoustic Gain (PAG) or Gain Before Feedback (GBF). In Mainland China, it is defined as the feedback threshold of the system minus the source volume, further reduced by 6 dB, and is referred to as transmission gain. What these terms describe is the maximum sound reinforcement volume that an electroacoustic system (including microphones) can provide before feedback occurs once it is established!

The reason for discussing this issue in this issue is: after setting up a conference system paired with their own choice of sound reinforcement backend equipment, many system integrators are unable to turn up the volume, which easily causes feedback. Is there something wrong with this choice? Is there a standard to follow? Learn about BXB Electronics Microphone Series Products BXB Electronics Monthly Case Study Report