Certification Info: Locating Exam Documents & Resources
Find out where to locate our most useful exam resources!
Design Software & Deliverables: Does anyone have experience from the design perspective using Simpro software?
Our company is transitioning away from D-tools System Integrator to Simpro and wondered if anyone has experience with Simpro software and how designers have transitioned (and/or what other drawing software is used in conjunction with Simpro).
Any insights are appreciated!
Institutional Hallways - Standards
What do other people do when designing distributed speaker systems in institutional hallways? What I've seen in the real world meets none of the best practices.
Choosing a microphone for a new auditorium
Hello everyone! A question was posted in Xchange's main Q&A that I wanted to bring to this room for assistance.
@Anand Munuswamy Sachudanand has asked:
"This question is from CTS-D AVIXA Activity which is from Design 1: ENV - Microphone. Microphone Pre-Amp Gain Required You need to choose a microphone for a new auditorium. Your sound source is a presenter located 2 feet (609.6 mm) away from the microphone, with a measured SPL of 72 dB. In order to route and process that signal, you need to amplify the microphone level signal to line (0 dBu). Most microphone preamplifiers will provide around 60 dB of amplification. You have a choice between two microphones: SM58: A Dynamic Microphone Equivalent Voltage Specification: -54.5 dBV/Pa (1.85 mV) MX418 A Condenser Microphone Equivalent Voltage Specification: -35.0 dBV/Pa (17.8 mV) 1 Pa = 94 dB SPL Answers: Pre-Amp Gain Required SM58: -74.29 dBu MX418/C: -54.79 dBu Till this it's OK and have understood. But given on same page is: Assuming you have a 60 dB gain in your microphone pre-amp, the SM58 is not sensitive enough for this application. The closer you can get to 0 dBu, the better the microphone will be for the application. You need 83.5 dB, but you only have 74.29 dB gain, leaving you 9.21 dB short. I have doubt on how this 83.5 dB has come. Could someone help me, please?"
Please share your expertise!