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!
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just curious Does anybody read this here?
Hi @Dmitry Klepikov and thank you for sharing your project with the community. Yes, please know that Xchange members are consuming your content and that it is not only reaching those visiting the community but it is also included in their Daily/Weekly Digests based on the channels and rooms they are subscribed to (Watching). You can access your analytics by clicking your avatar and selecting "My Analytics". You can adjust your date parameters and wait just a moment for the analytics to populate. You'll also note that content lives on, with many posts continuing to gain views months after being posted. And please know that you can always reach out to me with any questions! For now, I'm looking forward to seeing your "single very big and famous space"!!
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Hello, the Register Now link doesn't seem to work for me. Does it work for anyone?
Thanks @Michael Lewis ! I'll fix the link above. Try this: The Future of Work Spaces is All About Experiences | Avocor (exertisalmo.com)
Hey marketers! Let's weigh in on @Agil Huseynov's query! Agil, as you LED Solutions has expanded its product and service offerings, I think a refresh would be impactful in communicating your brand.
Chime in and @tag others here in the community who might wish to offer some sage advice! I'll start. @Craig Keefner, @David Keene, @Alan C. Brawn, @Nicole Verardi
@Rusty Stewart, thanks for sharing your insights. The AV/IT convergence is a critical aspect in healthcare - from interoperability issues to operating room management and across every aspect of patient care. I'd love to have you share any use cases from Marshall Industries and discuss any instances of collaborating with an IT team that resulted in improved care and efficiencies.
Great article @Sachin Aathreya !!!
Highlights from your article to me are:
* Compatibility and Interoperability
* Training and Handholding Support
Companies should always remember that whatever technology they chose, it has to be EASY to use, EASY to implement, and EASY to expand. Also, it´s vital to keep in mind that all technology vendors are an important part of an Ecosystem, and so we should all work on promoting compatibility and interoperability. That´s why we all need to develop solutions that take in consideration the different needs of the company, employees, providers and customers.
Then, when people gets familiar with the technology, we can help them to make the best out of their experience and also to easily manage troubleshooting whenever it´s required just as simlple as if they were using their daily electronics (TV, smart phone, computer).
When they get to the level where they understand that technology is there to make their lives simpler, and not the opposite, then we will have happy end user willing to try new things everyday.
Wow, @CARLOS MURILL0, that is a comprehensive path to customer success! Having them access your LMS is brilliant - allows you to keep the content fresh and up-to-date, along with ongoing live sessions. Congratulations and thanks so much for sharing!
Eager to learn more from the community - please build on what Sachin and Carlos have shared!
Great question! The short answer is to make up for the losses in the transformers.
Many years ago, I was doing the calculations for distributed loudspeaker systems and then doing physical measurements to see the accuracy of the methods. It turned out the measurements were not very close to the calculations. The measure impedance at the amplifier was always less than the calculated amount. It turns out the part missing was the transformer specifications. Looking at loudspeaker specifications, many times there is no mention of the transformer. Every transformer has loss.
I'm a bit concerned about your comment about 1.2x multiplier as the math sheet that is given at the CTS-D test offers a 1.5x multiplier. I will have to review the Study Guide and see if we need to these into alignment.
I multiplier of 1.2 is really subtracting about 0.8dB and a multiplier of 1.5 is subtracting about 1.8dB from the output. Or, put the other way, the amplifier needs an additional 0.8 or 1.8dB gain to make up for the transformer loss. Based on my measurements, I would opt for the larger number. Remember, a 3dB change is doubling the wattage of the amplifier.
In practice, under sizing an amplifier can cause real problems. An under sized amplifier will clip and distort the audio signal. If clipping continues over an extended period, the loudspeakers can overheat and damage the coils. The amplifier will be drawing as much current as it can, overheating the amplifier circuits which can cause premature failure. The audio quality coming from the system will not sound very good.
I hope that helps answer your question.
awesome. Thanks, @Paul Streffon, CTS-D, CTS-I! And thanks for bringing this question to the group, @Christopher Eloranta!
Great article @Sachin Aathreya !!!
Highlights from your article to me are:
* Compatibility and Interoperability
* Training and Handholding Support
Companies should always remember that whatever technology they chose, it has to be EASY to use, EASY to implement, and EASY to expand. Also, it´s vital to keep in mind that all technology vendors are an important part of an Ecosystem, and so we should all work on promoting compatibility and interoperability. That´s why we all need to develop solutions that take in consideration the different needs of the company, employees, providers and customers.
Then, when people gets familiar with the technology, we can help them to make the best out of their experience and also to easily manage troubleshooting whenever it´s required just as simlple as if they were using their daily electronics (TV, smart phone, computer).
When they get to the level where they understand that technology is there to make their lives simpler, and not the opposite, then we will have happy end user willing to try new things everyday.
Great points, @Sachin Aathreya and @CARLOS MURILL0. I agree that it's critical to take into account the needs of the individuals and the company - you're spot on with compatibility and interoperability. And yes, training - getting them comfortable using the system is essential for adoption and ultimately, the system's success.
I'd love to hear what you, and others, are doing to promote adoption - who on your team provides the initial training and how is that presented (in person, video...), what materials are created for the customer for reference, how does the end user initiate a support call....?