Not sure if this matters, but shouldn't there be agreement among the nouns? As in, "We hear with the ears on our heads."
Number agreement is overrated. You wouldn't say "I hear with the ear on my head".
That your head has more than one ear is exactly my point. EACH PERSON in the collective "we" has one head, but multiple ears. It's a perfectly sensible English sentence.
Now it's hard for me to tell the difference between the sounds of ørene and øerne (with the TTS anyway)...