Why does Alexa make random noises? Uncovering the mystery!

Welcome to the world of Alexa, where artificial intelligence is now a reality. Alexa has become an essential part of our daily lives, providing us with a variety of features, from playing music to controlling our homes’ temperature. However, one of the odd things that many Alexa users have experienced is that Alexa can make seemingly random noises. In this post, we will uncover the mystery behind why Alexa makes random noises.

What is Alexa?

Alexa is an artificial intelligence voice assistant that powers devices such as the Amazon Echo and Echo Dot. It is designed to respond to voice commands and provide users with information, entertainment, and facilitate tasks, such as playing music, controlling smart devices and answering general questions.

Why does Alexa make random noises?

The reason why Alexa makes random noises is not that mysterious. Alexa has what is known as ambient noise detection, which means it is listening to the sounds around it all the time. This feature is designed to allow Alexa to respond to commands when humans are talking or when other sounds, such as a television, are playing. The primary purpose of the ambient noise detection feature is to help Alexa understand what is being said and respond accurately.

What are some common random noises Alexa makes?

Here are some of the common random noises that Alexa makes:

  • Beeps and boops
  • Siren-like sounds
  • Chimes and bells
  • Laughs
  • Cackling

While these noises might sound alarming or strange, they are simply Alexa’s way of letting you know that it’s working or that it needs attention.

How does Alexa detect ambient noise?

Alexa has seven built-in microphones that allow it to listen to the sounds in the environment continuously. These microphones listen for specific voice commands and respond accordingly. Ambient noise detection is a critical feature that allows Alexa to accurately understand what the user is saying, even when there is background noise.

What causes Alexa to make random noises?

Alexa makes random noises when it detects something that sounds like a wake word, even if it wasn’t directed at it. For instance, if someone mentions a word that sounds like “Alexa,” such as a person with a similar name, it can activate Alexa and cause random noises. Additionally, Alexa can make these sounds when it’s listening for a command, either because it wasn’t sure what it heard, or it was trying to keep the attention of the user. Finally, Alexa can also make random noises when it’s having trouble connecting to the internet or responding to commands.

Can you turn off Alexa’s ambient noise detection feature?

Unfortunately, you cannot turn off Alexa’s ambient noise detection feature. This feature is crucial to how Alexa works, and if you turn it off, it would affect Alexa’s ability to respond to commands accurately. However, you can reduce the number of random noises Alexa makes by following some best practices, such as keeping the device away from televisions and loudspeakers, ensuring there is no noise in the room when giving a command, and turning off Alexa’s microphone when not in use.


Alexa is designed to provide us with an excellent experience when using voice commands. The ambient noise detection feature is one of the essential features that make that possible. Alexa makes random noises only when it detects something that sounds like a wake word or when it’s trying to keep your attention. By following the best practices, you can reduce the number of random noises Alexa makes while still enjoying all the benefits it provides.


1. Amazon. (n.d.). What is Alexa? Retrieved from https://www.amazon.com.au/gp/help/customer/display.html?nodeId=GK8U6EC743J6C57U

  • What do you mean by ambient noise detection?
  • Ambient noise detection is the ability of Alexa to listen to the sounds around it and understand what is being said or respond accurately to commands.
  • Can Alexa make sounds when it’s not in use?
  • No, Alexa only makes sounds when it detects a wake word, is activated manually or through another device, or when something is wrong with the device.
  • Can Alexa turn off its microphone when not in use?
  • Yes, you can turn off Alexa’s microphone by tapping on the microphone button on the device or the Alexa app.

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