iPhone 15 Pro One or two microphones on the bottom?

[rdgr.eu]

According to the information from Apple, the iPhone 15 Pro has two microphones on the bottom. On my voice recorder, only the left one works. Is my iPhone defective, or is there really only one microphone on the bottom?

iPhone

Designed for Apple Intelligence. Discover iPhone 17 Pro, iPhone Air, and iPhone 17, along with iPhone 16 and iPhone 16e.

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[chabig]

I thought it has just one microphone, but the tech specs say two. I don’t think recording software has the ability to distinguish between the microphones. They aren’t far enough apart for stereo. The captured audio is probably just going to the left channel.