0

#MusicMonday: Expert Advice on ‘Microphone Levels & Pressure Zone Mics’ | #audiophile

Good, quick read from EDN on PZMs – possibly how impulse responses are designed, although I’m still piecing together the theory behind it all let alone the real-world applications.

Many engineers and audio people don’t realize just how much signal can come out of a microphone. A hot mic with large signal can output many volts. That a dynamic microphone does this with a 120 ohm impedance is all the more remarkable (Figure 1). My pal, audio guru Steve Williams, recalled an entry in the Ampex Audio Digest bulletin board system (BBS):

“The circa 1968 demo for those who didn’t understand how much level could come out of a microphone (like those who were still trying to do rock-n-roll with Altec 1567 mixers with no input attenuators): Take your Simpson 260. Set it on the 2.5 VAC range, and connect it to the output pins of a Shure vocal mic. Hand the mic to someone with a good set of lungs, and have them do a good rock-n-roll scream. I never saw anyone pin the meter at 2.5 volts, but 1.5 volts was easily achieved.” anon

Figure 1 This plot shows microphone levels of a speaking voice can easily reach 0.1 volts. Shouts, screams, or loud music can be 20 times greater. (Source: Clifton Laboratories)

Read more.


Join 4,000+ makers on Adafruit’s Discord channels and be part of the community! http://adafru.it/discord

Learn “How Computers Work” with Bill Gates, Ladyada and more – From Code.org !

CircuitPython in 2018 – Python on Microcontrollers is here!

Have an amazing project to share? Join the SHOW-AND-TELL every Wednesday night at 7:30pm ET on Google+ Hangouts.

Join us every Wednesday night at 8pm ET for Ask an Engineer!

Follow Adafruit on Instagram for top secret new products, behinds the scenes and more https://www.instagram.com/adafruit/


Maker Business — Pololu’s New Machines

Wearables — Glue for the occasion

Electronics — Disable unused channels!

Biohacking — Two Blood Meters to Start Your Biohacking Adventure

Get the only spam-free daily newsletter about wearables, running a "maker business", electronic tips and more! Subscribe at AdafruitDaily.com !



No Comments

No comments yet.

Sorry, the comment form is closed at this time.