Microsoft Store offers the Sony Noise-Canceling Headphones in Black, model no. MDR-NC7, for $19 with free shipping. That's the lowest total price we could find by $11, although we saw them for $2 less in April. These foldable headphones feature a swivel design and ambient noise reduction of 87.4%.

Of note, assuming the noise reduction calculation is perfectly accurate, you'll only be subjected to 12.6% of the Eagles albums your neighbor likes to blast from his garage during the summer.