Microsoft Copilot Voice: Wake Word and Push-to-Talk Behavior

You want to start a conversation with Copilot using only your voice. The wake word feature lets you say “Hey Copilot” to activate the assistant without touching your keyboard or mouse. The push-to-talk feature gives you a manual way to start speaking by holding a button. This article explains exactly how both voice activation methods work on Windows 11 and Windows 10.

How Copilot Voice Activation Works

Copilot Voice uses two distinct methods to start listening for your spoken request. The wake word method relies on a background audio listener that watches for the phrase “Hey Copilot.” When the system detects this phrase, it opens the Copilot voice interface and begins recording your command. The push-to-talk method requires you to press a keyboard shortcut or click a button. This method does not use any background audio monitoring.

Wake Word Detection

The wake word engine runs as a low-priority background process. It samples audio from your default microphone in short intervals. The engine uses a local machine learning model to recognize the phrase “Hey Copilot.” No audio data is sent to Microsoft servers during wake word detection. Only after the wake word is recognized does the system start sending your spoken command to the cloud for processing.

Push-to-Talk Activation

Push-to-talk bypasses the wake word engine entirely. You press Win+Shift+K on your keyboard, and a small voice input window appears at the top of your screen. The window shows a microphone icon and a waveform indicator. Copilot starts recording immediately and sends the audio to the cloud when you stop speaking or press Escape.

Steps to Enable and Use Wake Word

Before you can use the wake word, verify that your microphone is working and that Copilot has permission to access it. Follow these steps.

1. Open Windows microphone settings
   Go to Settings > Privacy & security > Microphone. Ensure “Microphone access” is turned on. Scroll down to “Let apps access your microphone” and confirm it is enabled. Find Copilot in the list and set its toggle to On.
2. Open Copilot settings
   Click the Copilot icon on the taskbar or press Win+C. Click the gear icon in the upper-right corner of the Copilot pane. Select “Voice” from the settings menu.
3. Enable the wake word
   Under “Wake word,” toggle the switch to On. A confirmation dialog may appear asking you to speak a short phrase for voice training. Follow the on-screen prompts.
4. Test the wake word
   Close the settings pane. Say “Hey Copilot” clearly into your microphone. The Copilot pane should open automatically and show a listening indicator. Speak your command, such as “What is the weather today?”
5. Adjust wake word sensitivity if needed
   If Copilot activates too often or not at all, return to Copilot settings > Voice. Adjust the “Sensitivity” slider. Higher sensitivity detects the wake word from farther away but may trigger on similar sounds.

Steps to Use Push-to-Talk

Push-to-talk works without any wake word configuration. It is the preferred method when you want to avoid accidental activations.

1. Press Win+Shift+K
   This keyboard shortcut opens the Copilot voice input window. The window appears as a thin bar at the top center of your screen. A microphone icon pulses to indicate it is ready.
2. Speak your command
   You do not need to hold any key while speaking. The system records until it detects a pause of about one second. Speak naturally and clearly.
3. Review the transcribed text
   After you stop speaking, the voice input window disappears. Copilot processes your speech and displays the transcribed text in the Copilot chat pane. You can edit the text before sending if needed.
4. Cancel voice input
   Press Escape while the voice input window is open to cancel the recording. No audio is sent to Copilot.

Common Issues and Limitations

Wake word does not respond to “Hey Copilot”

The most common cause is the wake word toggle being turned off in Copilot settings. Open Copilot settings > Voice and confirm the toggle is On. Another cause is microphone permissions being revoked by a Windows update. Go to Settings > Privacy & security > Microphone and verify Copilot has permission. If the issue persists, restart the Copilot app by right-clicking the Copilot icon on the taskbar and selecting “Quit,” then reopening it.

Push-to-talk shortcut Win+Shift+K does nothing

This shortcut may be assigned to another app. Open Settings > Accessibility > Keyboard and scroll to “Shortcuts.” Look for any entry that uses Win+Shift+K. If another app uses it, change that app’s shortcut or disable it. You can also try pressing Win+Shift+K while the Copilot pane is already open. If the pane is not open, the shortcut may not register. Press Win+C to open Copilot first, then press Win+Shift+K.

Copilot activates unintentionally in the background

This happens when the wake word sensitivity is set too high or when background noise contains sounds similar to “Hey Copilot.” Lower the sensitivity slider in Copilot settings > Voice. If the problem continues, turn off the wake word toggle and use push-to-talk exclusively. You can also mute your microphone when not using Copilot.

Voice input window appears but no audio is captured

This indicates a microphone hardware or driver issue. Open Sound settings by right-clicking the speaker icon on the taskbar and selecting “Sound settings.” Under “Input,” ensure your default microphone is selected and the volume bar shows movement when you speak. If no movement appears, try a different microphone or update your audio driver from Device Manager.

Item	Wake Word	Push-to-Talk
Activation method	Voice phrase “Hey Copilot”	Keyboard shortcut Win+Shift+K
Background audio monitoring	Yes, continuous sampling	No, only when shortcut is pressed
Requires microphone permission	Yes	Yes
Privacy impact	Higher, always listening for wake word	Lower, no background audio
Best for	Hands-free use, accessibility needs	Quiet environments, avoiding false activations
Supported languages	English US, UK, Australia, Canada, India	All languages supported by Copilot text input

Wake word is currently limited to English dialects. Push-to-talk supports any language that Copilot can process as text input. If you work in a shared office or open-plan space, push-to-talk is the recommended method to avoid triggering Copilot during conversations with colleagues. You can also use the mute toggle on your headset or microphone to prevent accidental wake word detection.

You can now choose between hands-free wake word activation and manual push-to-talk for Copilot Voice. Try the wake word setting first if you need accessibility support or frequently multitask. Use push-to-talk with Win+Shift+K when you want precise control over when Copilot listens. For the most reliable experience, keep your microphone drivers updated and review the microphone permission settings after each major Windows update.