You ask for one thing and get another, or the speaker wakes when nobody said anything, or it simply does not respond until you shout. Voice recognition depends heavily on what the microphones can actually hear, and placement matters far more than most people realise.
The short answer
Move the speaker away from walls and corners, which reflect sound and confuse the microphone array, and away from anything that makes constant noise. Then run the voice training the assistant offers, which genuinely improves recognition of your accent and phrasing. Those two together fix most complaints without changing anything else.
How it decides what you said
A smart speaker has several microphones arranged around its body. It compares what each one hears to work out which direction your voice came from, then focuses on that direction and suppresses everything else. This is why placement matters: reflections from a nearby wall arrive at the microphones out of step and confuse the direction finding, which degrades the whole process before any speech recognition happens.
Once it has isolated your voice, it listens for the wake word locally, then sends the following audio to be interpreted. Background noise, reverberation and a poor signal all reduce accuracy at every stage.
Move it away from walls and out of corners
At least twenty centimetres from a wall, and out of corners entirely. A speaker in a corner hears its own reflections and the microphone array cannot work out where your voice came from.
Get it off the shelf and into open air
Inside a bookshelf, behind a plant, or under a cabinet all muffle the microphones. Open air at roughly waist height or above works best.
Move it away from constant noise
Extractor fans, fridges, aquarium pumps, air purifiers and radios all add continuous background noise that the speaker must work through. A metre away from any of them makes a noticeable difference.
Run the voice training
Most assistants offer a setup where you read phrases aloud. It genuinely improves recognition of your accent and speech patterns, and it is worth the five minutes. Have each household member do their own.
Change the wake word if one keeps false-triggering
Most assistants offer alternatives. If the speaker wakes constantly during television or conversation, a different wake word usually stops it, and it costs nothing to try.
Adjust the wake word sensitivity
Some devices let you tune this. Lower it if the speaker wakes at nothing; raise it if it ignores you. It is a trade-off rather than a setting with a correct value.
Review the voice history
Every assistant keeps a record of what it heard. Reading the transcripts of failed commands is far more useful than guessing, because you can see exactly what it thought you said and adjust your phrasing accordingly.
Rename devices to things that sound distinct
If you have devices called Bedroom Light and Bathroom Light, mishearing is inevitable. Names that sound clearly different from one another are the single easiest improvement in a house with many devices.
The voice history is the most underused tool here. It shows the transcript of what the speaker thought you said, and the reason for a failure is usually obvious the moment you read it: a device name misheard, a word cut off because you started speaking too soon after the wake word, or a phrase the assistant does not support. Ten minutes reading it is worth an hour of guessing.
Speaking so it understands
- Pause after the wake word. A short gap gives the device time to start listening. Running the command straight on from the wake word loses the first syllable, which is often the important one.
- Speak at normal volume. Shouting distorts and makes recognition worse, not better.
- Face it, roughly. The array is directional, and speaking away from it while walking out of the room is a harder problem than it needs to be.
- Use consistent phrasing. Assistants handle a set of patterns well and improvise poorly. Find the phrasing that works and stick with it.
- Keep device names short and distinct. Two syllables that sound nothing like each other.
If the speaker keeps activating when nobody has spoken, check the voice history to see what it thought it heard. Recordings triggered by a false wake are stored the same as real commands, and if a television programme or a conversation is triggering it regularly, changing the wake word deals with both the annoyance and the privacy question.
When it is the hardware
If recognition has worsened noticeably rather than always being mediocre, and moving the speaker has not helped, check the microphone openings for dust. They are small holes on the top surface and they collect debris like anything else. Brush them dry, never push anything in, and never use liquid.
Also check whether the microphone mute switch has been half pressed or knocked, since some devices have a physical mute that is easy to trigger. If the indicator shows muted, nothing else on this page matters.
Why does my smart speaker mishear me?
Usually placement. Walls and corners create reflections that confuse the microphone array, and constant background noise from appliances makes it worse. Moving it into open air fixes most cases.
Does voice training actually help?
Yes, noticeably, particularly for accents the assistant handles less well by default. It takes five minutes and each household member should do their own.
Why does it wake up when nobody is talking?
Something sounds like the wake word, often on television. Check the voice history to see what it heard, and change the wake word if it keeps happening.
Should I speak louder?
No. Shouting distorts and makes recognition worse. Speak at normal volume, pause after the wake word, and face the device roughly.
How should I name my smart home devices?
Short, and sounding clearly different from each other. Bedroom Light and Bathroom Light will be confused constantly; Bed Light and Shower Light will not.
The bottom line
Move the speaker out of the corner and away from anything that hums, because placement accounts for most recognition problems. Run the voice training and read the voice history, which tells you exactly what went wrong rather than leaving you guessing. And rename any devices whose names sound alike, since that is where a lot of the mishearing actually comes from.
