The iPhone 15 has a better mic than the 11 Pro
Here’s a test recording on the iPhone 11 Pro:
And here’s one on the 15:
Both were held a few inches away from my mouth.
Notice how the iPhone 15’s audio sounds more natural — it has fewer artifacts, and you can hear minor nuances in my voice better. The iPhone 15 sounds like hearing my voice in person, while the iPhone 11 Pro sounds like a low-quality recording.
In fact, you don’t even need to buy a dedicated microphone to record a podcast1.
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1
Just mount the iPhone on a tripod.
On your Mac, in System Settings > Sound, select the Input tab and then your phone. Plug your iPhone into your Mac, because a wired connection is more reliable, and because it prevents your phone from running out of charge mid-way.