Is Alexa Always Listening? New Study Examines Accidental Triggers of Digital Assistants

Nat Levy, GeekWire
Nat Levy is a staff reporter at GeekWire covering a variety of technology topics, including Microsoft, Amazon, tech startups, and the intersection of technology with real estate, courts and government. Follow him on Twitter at @natjlevy​​ and read his stories at GeekWire.
Is Alexa Always Listening? New Study Examines Accidental Triggers of Digital Assistants

The listening capacity of digital assistants like Alexa and Siri has become a major privacy sticking point in the last year. A group of researchers out of Northeastern University and Imperial University of London have been studying smart speakers for the last six months to learn more about what triggers them, and whether or not they are "listening" all the time.


The ongoing study found "no evidence to support" the possibility that digital assistants are always listening. The devices did get activated often in the study, primarily by words that sound similar to the phrases meant to wake them up — for Alexa, examples include words with "k" sounds such as "exclamation", "kevin's car" and "congresswoman" — but they only stay on for short intervals of a few seconds up to nearly a minute.

The researchers set up several smart speakers — a couple of Echos, a Google Home Mini, Apple HomePod and a Microsoft Cortana-powered Harman Kardon Invoke — and built an area where they could monitor and record when and how they were activated. The team played 125 hours of shows on Netflix with heavy dialog, including The Office, Gilmore Girls and Grey's Anatomy and recorded which phrases — outside of the traditional "wake words" — activated the devices.

The study found that the Echo Dot 2nd Generation and the Invoke stayed awake the longest, between 20 and 43 seconds. The rest of the devices had shorter activation period, with nearly half of them lasting 6 seconds or less.

While words that sounded like the wake phrases triggered devices, it was challenging to get repeat results. The team repeated its experiments 12 times, and only 8.44 percent of the activations occurred consistently.

The definition of "listening" in this context can get confusing, even for the people who make the devices. Under questioning on an episode of PBS Frontline last week, Amazon devices chief Dave Limp was asked how Amazon could convince millions of people to install "listening devices" in their home. Limp appeared to misstep when answering the question, insisting that Alexa isn't a listening device, before describing how it's "listening," then backtracking.

"I would first disagree with the premise. It's not a listening device," Limp said. "The device in its core has a detector on it — we call it internally a 'wake word engine' — and that detector is listening — not really listening, it's detecting one thing and one thing only, which is the word you've said that you want to get the attention of that Echo."

The question of how these virtual assistants are monitoring for wake words will become even more important as they spread to different types of Internet of Things devices, such as a smart ring and Alexa-enabled eyeglasses unveiled by Amazon last year.

Throughout 2019, reports surfaced that teams of employees at tech giants including Google, Amazon, Apple and more listen in to some audio clips of utterances made to their smart speakers to improve the digital assistants. Amid privacy concerns, the companies began allowing users to opt out of having their audio clips reviewed.

The report is only step one of a larger project. Future updates will look into how many activations lead to audio recordings sent to the cloud versus processed only on the device; whether cloud providers accurately show all cases of recorded audio; if the speakers adapt and adjust to what they've heard; and how the gender, ethnicity, accent and other factors affect activations of the speakers.

This story originally appeared on GeekWire.

LA Tech Week 2025: Sunday’s Event Lineup

Here's the Sunday, October 19th lineup for LA Tech Week 2025, organized by location so you can easily explore events that fit your goals and schedule. Dive in and see what’s happening near you!

ARTS DISTRICT

3:00 PM

BEL AIR

3:00 PM – 7:00 PM

BURBANK

6:30 PM – 9:30 PM

CULVER CITY

9:00 AM – 5:00 PM

4:30 PM – 7:30 PM

INGLEWOOD

10:00 AM – 2:00 PM

  • Spinovation: The Future Is Femme, The Future is Frequency: See Details Here
    Sonder Impact, Black Women Spin, Sip & Sonder

KOREATOWN

12:00 PM – 3:00 PM

MARINA DEL REY

12:00 PM

  • Sunday Tech Brunch
    Sawubona

MID CITY

9:00 AM – 11:00 AM

  • Women in Cleantech Hike and Network: See Details Here
    Women in Cleantech and Sustainability

SANTA MONICA

9:00 AM

10:00 AM

3:45 PM

4:00 PM – 7:30 PM

  • OFF THE HOOK Santa Monica Seafood Festival: See Details Here
    Spin PR Group, City of Santa Monica, Tech St.

6:00 PM

7:00 PM

  • Pritam: A Musical Legend - Live in Concert: See Details Here
    American South Asian Network

7:00 PM

  • Building AI workflow editor in React with Workflow Builder SDK: See Details Here
    Workflow Builder

7:00 PM

8:00 PM

  • Unlock Apple's Corporate Advantage for your Startup!: See Details Here
    iStore by St. Moritz

TOPANGA CANYON

3:00 PM

  • Dreamore Hike and Picnic: LA Tech Week: *Invite Only*
    Dreamore

VENICE

10:00 AM – 12:00 PM

  • Coffee, Walk, and Schmooze: See Details Here
    JFE (Jews For Entrepreneurship) Network

VIRTUAL (LA)

10:00 AM

  • Level Up with LinkedIn: A Student’s Guide to Networking & Opportunities (Virtual Event): See Details Here
    FIMAC

10:00 AM

WEST ADAMS

1:00 PM – 3:00 PM

For updates or more event information, visit the official Tech Week calendar.

Enjoy LA Tech Week 2025!

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LA Tech Week 2025: Saturday’s Event Lineup

Here's the Saturday, October 18th lineup for LA Tech Week 2025, organized by location so you can easily explore events that fit your goals and schedule. Dive in and see what’s happening near you!

BEVERLY HILLS

2:00 PM

CENTURY CITY

7:00 PM – 10:00 PM

CULVER CITY

9:00 AM – 5:00 PM

10:00 AM – 11:30 AM

1:00 PM

DTLA

7:00 PM

  • {MiniMax x Nakid x SkyPortalx}: TECH/MOTION/MUSIC/ART: See Details Here
    MiniMax (Hailuo AI)

10:00 PM – 2:00 AM

EL SEGUNDO

10:00 AM

  • Venture on the Green: *Invite Only*
    BLCK VC

4:00 PM

INGLEWOOD

7:00 PM

  • Valar Atomics, Durin and Discipulus Ventures - Night With A Nuclear Reactor: See Details Here
    Valar Atomics, Durin, Discipulus Ventures

MARINA DEL REY

8:30 AM

12:00 PM – 3:00 PM

5:00 PM

  • LOST iN Sunset Sail: Navigating the Tides of the Creator Economy & Media: See Details Here
    LOST iN

PASADENA

9:00 AM

PLAYA VISTA

2:00 PM – 4:00 PM

SANTA MONICA

7:00 AM

9:00 AM

  • Pedal & Network: Tech Cyclists @ LA Tech Week 🚵: See Details Here
    Instafill.ai

9:30 AM

  • Getty Center Guided Tour & (Optional) Photography Scavenger Hunt: See Details Here
    NEW MOON Impact Productions

10:30 AM – 11:30 AM

11:00 AM – 2:15 PM

12:00 PM – 5:00 PM

1:00 PM – 5:00 PM

1:30 PM

  • Self-Defense in Court and the Streets: See Details Here
    Santa Monica Striking, Luri Inc.

2:00 PM

  • SMARTUP 500: THE FIRST AT TECH WEEK LA - Launching the world’s first Startup Ranking: See Details Here
    Smart Times

2:00 PM

  • NLPs (No Lame Panels) The Creator X Founder Rooftop Party: See Details Here
    Startup Village, Sanctuary

3:00 PM – 4:00 PM

4:00 PM – 6:30 PM

  • Just Do It?: Helping Founders Perform Like Olympians: See Details Here
    Elite Psychology Group

5:00 PM

6:00 PM

6:00 PM – 9:00 PM

6:00 PM

6:00 PM – 9:00 PM

  • The Future of Hospitality: Poetry, Provenance & Passports: See Details Here
    Villa Kitchen, Airble, We Speak Dance, Techstars San Francisco

7:00 PM

  • 🚀 Investor x Founder Open Mic Pitches: See Details Here
    Feathr, Los Angeles Fun Events

7:00 PM

  • Life is a Pitch - LA Edition: *Invite Only*
    DeepMyst

TOPANGA CANYON

5:00 PM – 8:30 PM

  • Walk&Jam: Use AI to make art while hiking Topanga Canyon: See Details Here
    Formhaus llc, Wonderland Immersive Design

TORRANCE

1:00 PM – 4:00 PM

  • Crunches & Conversations Presented by The Differentials and KIS Training Studios: See Details Here
    The Differentials, KIS Training Studios

VENICE

1:00 PM – 4:30 PM

  • Beyond the Language Barrier: Exploring AI's Next Frontier: See Details Here
    Medusa AI

VENICE BEACH

8:00 AM – 12:00 PM

  • SŨRFED Club @ Venice Beach: Founders, Creators, Investors share the waves: See Details Here
    SŨRFED Club, Go Vitamins

WEST ADAMS

9:30 AM – 10:45 AM

  • Funders Shaping Democracy, AI & Media: See Details Here
    New Media Ventures, New Rising Ventures

WEST HOLLYWOOD

4:00 PM

6:00 PM – 8:00 PM

9:30 PM

  • Vibe Check Comedy Show, Tech Week Edition! @ Hollywood Improv: See Details Here
    Vibe Check Comedy

For updates or more event information, visit the official Tech Week calendar.

Enjoy LA Tech Week 2025!

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LA Tech Week 2025: Friday’s Event Lineup

Here's the Friday, October 17th lineup for LA Tech Week 2025, organized by location so you can easily explore events that fit your goals and schedule. Dive in and see what’s happening near you!

ARTS DISTRICT

8:30 AM – 12:00 PM

  • Power Day: Ideas, Pitches, Connections: See Details Here
    Los Angeles Cleantech Incubator (LACI)

6:00 PM

  • WEB3 GAMING IS DEAD - Happy Hour: See Details Here
    Plassa Capital, Yee-Haw Monster Trucks

BEVERLY HILLS

10:00 AM – 11:00 AM

1:00 PM – 2:00 PM

2:00 PM – 3:00 PM

3:00 PM – 4:00 PM

4:00 PM

6:00 PM – 9:00 PM

  • So you went viral, Now what? (pt II): See Details Here
    Verci, Study Fetch, TechSpace

8:00 PM

  • Private Pool: GP x LP x FO: *Invite Only*
    Visionlist Commons , Bay Area Innovest

BRENTWOOD

8:00 AM

  • Founders & Investors Hike: See Details Here
    Salehpour Legal, Technology Founders of America

CARSON

11:45 AM

  • Lightspeed x SVB Porsche Experience: *Invite Only*
    Lightspeed Venture Partners, SVB

CULVER CITY

8:00 AM – 6:00 PM

11:00 AM

1:00 PM

  • Surf Parks & Wave Pools: From Doja Cat to Mark Zuckerberg: See Details Here
    Surflytics

8:00 PM – 12:00 AM

EL SEGUNDO

11:30 AM – 2:00 PM

5:00 PM – 8:00 PM

HOLLYWOOD

10:00 AM

  • AI, Revenue, and Reality: How Fortune 500s Work With Startups That Ship: See Details Here
    Sunrise AI, OpenTable

12:00 PM – 2:00 PM

  • Unplugged: LA Tech Week Recharge Experience with TAY × Checked Out: See Details Here
    TAY Fitness, Checked Out

9:00 PM

INGLEWOOD

8:00 AM

  • TCSI Presents: Caffeine & Connections: See Details Here
    The Cyber Security Intellects Nonprofit

LONG BEACH

7:00 AM

MALIBU

10:00 AM

  • Great Leaders Podcast & Profiles: See Details Here
    NEW MOON Impact Productions, Origin Studios

12:30 PM

MARINA DEL REY

9:00 AM

  • Keeping Your Freedom as a Founder: Real Talk on Funding: See Details Here
    Lighter Capital

10:00 AM – 1:00 PM

  • D-Wave Research Day & Hackathon!: See Details Here
    USC Information Sciences Institute, D-Wave

4:00 PM – 6:00 PM

  • The Sky is Not the Limit: All About Aerospace: See Details Here
    Sunstone Management, USC Viterbi Startup Garage

PASADENA

10:00 AM – 1:00 PM

11:30 AM – 1:30 PM

  • Deep Tech Entrepreneurship Pillars of Pasadena Tech: See Details Here
    Innovate Pasadena, Pasadena SBDC, City of Pasadena

PLAYA VISTA

9:00 AM

12:00 PM – 2:00 PM

  • Vision to Venture - AI Media Showcase powered by Google AI: See Details Here
    Google

SANTA MONICA

7:00 AM – 8:30 AM

  • Signal Run : RTC x Wildwood VC: See Details Here
    Run Tech Club, Wildwood Ventures

7:30 AM

8:45 AM – 10:45 AM

9:00 AM – 11:00 AM

  • Slash Burn Rates & Scale Your Startup: See Details Here
    Arizona Commerce Authority (ACA)

9:00 AM

  • Driving a Digital Ecology Relay: What is at Stake: See Details Here
    The PORT GLOBAL, GLOBAL PORTAL INSTITUTE

9:30 AM – 11:30 AM

10:00 AM – 1:00 PM

  • The Enduring Value of Inclusive Capital: See Details Here
    Founders Registry. Nervana

10:00 AM – 12:00 PM

10:30 AM

11:30 AM – 1:00 PM

  • Advisors to Investors Lunch: Venture Capital for enterprise leaders: See Details Here
    Collinear Capital, Worlds

12:00 PM

  • Powerhouse Capital & a16z speedrun Investor Lunch Mixer: See Details Here
    Powerhouse Capital, a16z, speedrun

2:00 PM

  • Where Robotics Meets Heart - Embedding Family Values in a Future with AI: See Details Here
    Trove, Puerto Rico Blockchain Association, MindfulBytes

2:00 PM

3:00 PM

3:00 PM

3:00 PM

  • Workshop: Create An Enterprise Chatbot and Unlock the 70% of Data Data You’re Not Using: See Details Here
    Aparavi

4:00 PM

5:00 PM – 10:00 PM

5:30 PM

5:30 PM – 9:30 PM

6:00 PM – 8:30 PM

  • USC Alumni Founders & Investors: See Details Here
    USC Alumni Entrepreneurship Network, Techstars

6:00 PM

  • Social Currency Series/Greenlit presents PitchPop: See Details Here
    Social Currency Series, Greenlit

6:00 PM – 9:00 PM

6:30 PM

6:30 PM – 10:00 PM

6:30 PM

  • Lets get the LA Bioeconomy brewing: See Details Here
    Founders, Friends & Fermentation, Saku Biosciences

7:00 PM – 11:30 PM

7:00 PM – 10:00 PM

7:00 PM – 10:00 PM

7:00 PM

7:00 PM

  • Liquid Equity 2: The Premiere Gathering for Founders, Creator
    Coeus Collective

7:00 PM

7:00 PM

  • For the Love of Tech | Speed Dating for Tech Professionals: See Details Here
    Feathr, Los Angeles Fun Events

7:00 PM

SOUTH LA

3:00 PM

TORRANCE

9:00 AM – 11:00 AM

  • The Future of Space & Security Panel: See Details Here
    Northwood Space, Anduril Industries, Impulse Space, Astranis

VENICE

9:00 AM – 10:45 AM

9:00 AM – 11:30 AM

11:00 AM

11:30 AM – 2:30 PM

12:30 PM

  • Creative Partners: Human + AI Storytelling: See Details Here
    Othelia, Primordial Soup

2:00 PM – 3:45 PM

5:00 PM

  • EarthHouse: Critical Minerals, Mobility & Modern Power: See Details Here
    The Strategye Group, Alpha Sierra One

6:00 PM – 9:00 PM

6:00 PM

  • Pizza+Soda: *Invite Only*
    Schmoozd , The KINN

7:00 PM

VENICE BEACH

2:00 PM – 6:30 PM

5:00 PM

8:30 PM – 2:00 AM

VIRTUAL (LA)

2:30 PM – 4:00 PM

3:00 PM

  • Government of Alberta: ProcurementAsCode // Done in 60 Seconds: See Details Here
    Government of Alberta

4:00 PM

  • Stop Hitting Yourself 🥊: See Details Here
    Stop Hitting Yourself, HOWDY, Company Policy, Snowbird Global

WEST HOLLYWOOD

3:00 PM – 6:00 PM

6:00 PM

WESTSIDE

5:00 PM

5:30 PM – 8:30 PM


For updates or more event information, visit the official Tech Week calendar.

Enjoy LA Tech Week 2025!

Download the dot.LA App


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