New "smart" MEMS microphones enable recording with a quality once reserved only for musicians and rich wannabes with their own private recording studios.
Remember what a big hit Guitar Hero was when it first came out? All of us air-guitar amateurs were able to justify and perfect our skills at playing in a rock band—all in the comfort of our family rooms. If you are a MEMS-nerd like I am, you may recall that MEMS played a significant role in the success of the Guitar Hero. (Without the tilt motion-sensing provided by the MEMS accelerometer inside, we might as well be playing "Kumbaya" instead of "Walk this Way.")
After hearing the beautiful sound achieved with the high-performance MEMS microphone that Rob O'Reilly of Analog Devices demonstrated at Sensors Expo 2012, I have the same kind of anticipation for what kind of rock star(s) this MEMS device might unleash. Because what makes this MEMS mic so different is that the quality of the sound is so clear and perfect that it can make anyone sound like a rock star, sans the million-dollar recording studio. What's more, my sources at Analog Devices tell me that this new "smart" MEMS is also lower cost.
[ARM TechCon 2012, the largest ARM design ecosystem under one roof, is Oct. 30 - Nov. 1 in Santa Clara. Click here to learn more]
What makes it smart? According to the folks at Analog Devices, their MEMS microphone technology provides a higher signal-to-noise ratio for better near and far-field performance, flatter frequency response and noise rejection, ultimately producing better quality sound. Throw beam forming, directionality and proximity response into the mix and you have a microphone for a wide range of applications.
With all deference to the Walt Disney Company, I asked Rob O'Reilly how ADI makes the magic. "With our MEMS microphone, we integrate more of the signal chain than any other MEMS mic by integrating a MEMS transducer with a proprietary audio ASIC that leverages our decades of audio signal-processing experience," he replied.
In this video clip, you can learn more about the MEMS mic from my interview with Jerad Lewis, microphone applications engineer at Analog Devices.
There are several MEMS manufacturers in the MEMS microphone space including Akustica (part of the Bosch Group), Knowles, STMicroelectronics (jointly developed with their partner OMRON), and a few other smaller players. I don't want to start a contest of whose MEMS mic is "better." I happened to hear Rob's demo, and was astounded by the sound quality. I am all ears if anyone else wants to demo the amazing qualities of their MEMS microphone. Or you can hire me to record a little something for the Grammys. That would be good, too!
HI everyone! I am so pleased to see such an animated discussion about MEMS microphones - and yes @mediatechnology - the link to the demo file is missing in the story (sorry about that) - I'll look into getting it uploaded somewhere by my friends at Analog Devices. I guess I have this Pollyanna-ish view that Rockstars have good voices (I am sure all do not). :)
@Brakeshoe - Recently at a conference I held at UC Berkeley we had another MEMS mic company, Knowles Electronics, talk about the use of MEMS mics in hearing aids and their cross-over into consumer applications. You can check out my org's website for more info: www.memsindustrygroup.org. Thanks everyone and keep the comments coming - I love it and look forward to more on my next blog.
What other topics in MEMS would you like me to write about?
January 2016 Cartoon Caption ContestBob's punishment for missing his deadline was to be tied to his chair tantalizingly close to a disconnected cable, with one hand superglued to his desk and another to his chin, while the pages from his wall calendar were slowly torn away.122 comments