Producer
Knowles Corporation
Leading MEMS microphone maker for phones, earbuds and hearables.
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Inputs supplied
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Goods downstream
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Facilities
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Stories
What they make
2 inputs Knowles Corporation supplies
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Audio Components
72%Precision Devices (RF & Sensing)
28%
Intelligence
What's known
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Did you know2024
Knowles' MEMS microphones — designed to enable "Hey Alexa" and "Hey Siri" ambient voice wake-word detection — are identical in architecture to the acoustic sensors used in surveillance microphone arrays deployed by intelligence agencies and law enforcement in room audio monitoring. The same microphone component that captures ambient voice commands in a consumer smart speaker meets the sensitivity, size, and SNR specifications required for covert room microphones. Knowles supplies both commercial smartphone/smart home supply chains and defense/intelligence electronics supply chains from the same product families. The MEMS microphone in a consumer Echo is supply-chain-identical to microphones used in classified acoustic monitoring systems.
Knowles Corporation ↗Concentration2024
Knowles Corporation holds approximately 60–70% of the global market for balanced armature transducers — the primary acoustic transducer in all hearing aids. Every major hearing aid brand (Phonak, Oticon, Starkey, ReSound, Widex) uses Knowles BA receivers. Hearing aids are regulated medical devices under FDA (Class II), meaning substitution requires a new 510(k) clearance that takes 6–18 months. A fire, flood, or tariff action affecting Knowles' Arden Hills, Minnesota manufacturing facility would result in a global hearing aid production stoppage lasting 1–2 years, affecting new device availability for approximately 28.8 million Americans who are hard of hearing.
Knowles Corporation ↗Origin2024
Knowles Corporation traces to the Brush Development Company (Cleveland, 1930s), which pioneered piezoelectric crystal technology for audio transducers derived from sonar research during World War II. The balanced armature transducer design — which Knowles later dominated — was originally developed for telephone handsets and military field communication earpieces in the 1940s. Knowles was acquired by Dover Corporation in 1996, then spun off as an independent public company (NYSE: KN) in 2014. The company's founding technology was literally WWII sonar and military communications audio; the same transducer principle now lives in $6,000 audiophile in-ear monitors and $5,000 FDA-approved hearing aids.
Knowles Corporation ↗