Yes, that should be "higher" SNR, just as I believe your last question should be "does SNR increase as size shrinks". The trends are to smaller sizes--already die sizes are dipping below 1 mm--but I don't believe scaling is the sole contributor to higher SNR.
According to IHS Knowles is way out front in the top 10 followed by AAC, Invensense (through its acquisition of Analog Device MEMS mic business), Goertek, STMicroelectronics, Hosiden, BSE, Wolfson, Bosch and NeoMEMS.
Its the voice command algorithms that do that magic, but the old "garbage-in garbage-out" rule applies here too, in that the higher definition the MEMS mic, the more accurate will be the recognition of voice commands.
What are the engineering and design challenges in creating successful IoT devices? These devices are usually small, resource-constrained electronics designed to sense, collect, send, and/or interpret data. Some of the devices need to be smart enough to act upon data in real time, 24/7. Are the design challenges the same as with embedded systems, but with a little developer- and IT-skills added in? What do engineers need to know? Rick Merritt talks with two experts about the tools and best options for designing IoT devices in 2016. Specifically the guests will discuss sensors, security, and lessons from IoT deployments.