Sony WH-1000XM4

Sony WH-1000XM4


Review date: Nov. 8, 2021


Mozilla says

People voted: A little creepy

What's this? Headphones that brag about how well they play music and cancel sound? It's refreshing to see. Sony seems to focus on all things audio with these pricey, critically acclaimed wireless headphones. They do offer something called "smart listening technology" so when you start to talk, the headphones pause the music so you can have a "hands-free conversation" (who knew we needed hands-free conversations!). For the most part, Sony keeps it all about what you hear — or don't hear — when you put these things on. Hey, that actually sounds good.

What could happen if something goes wrong?

We couldn't find too much that could go wrong with Sony’s headphones. We suppose you might go and try to read their privacy policy, get lulled into boredom by the complex, legal language and fall asleep with the volume on your headphones up way too loud, causing hearing loss. Don't listen to your music so loud when reading privacy policies! And Sony, please make your privacy information more accessible to consumers.

Sony does say it may use or share de-identified personal data for advertising purposes. This is generally OK, although many privacy researchers will point out it is relatively easy to de-anonymize such data. Also, if you choose to use Amazon Alexa or Google Assistant with this smart speaker, know that Google and Amazon will collect data on the voice requests you make.

Tips to protect yourself

  • Consider setting up a password for Bluetooth pairing
  • Consider using your headphones without connecting it to an app. This way, you may decrease amount of data collected
  • mobile

Can it snoop on me? information


Device: No

App: Yes


Device: Yes

App: No

Tracks location

Device: No

App: No

What can be used to sign up?

What data does the company collect?

How does the company use this data?

To the extent permitted by law, SONY Affiliates may share de-identified Collected Data with network advertisers or others in order to target advertisements to you or limit the number of times you see advertisements. You may be able to opt out of certain targeted advertising by visiting the TRUSTe's website.

How can you control your data?

A user does not have to connect a device to the app. SONY will collect the data for as long as you use the Device and such Collected Data will be deleted within twenty-seven (27) months from the date of such collection.

What is the company’s known track record of protecting users’ data?


No known incidents in the last 3 years.

Can this product be used offline?


User-friendly privacy information?


Sony has a separate privacy policy for audio products and for their Headphones Connect app on top of their electronics privacy policy. These privacy policies are written in legalise.

Links to privacy information

Does this product meet our Minimum Security Standards? information




Strong password


The optional “Headphones Connect” App requires a password when you use the “Backup and restoration of settings” function.

Security updates


Manages vulnerabilities


Privacy policy


Does the product use AI? information


*Privacy Not Included


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