NPD is today out with new data on the smart speaker market as the HomePod nears its second month of availability. The research offers color on HomePod’s first day demand, as well as the audio market as a whole…

Unfortunately, NPD doesn’t offer any specific numbers for HomePod pre-orders.

Elsewhere, the research group says that sales of Bluetooth headphones as well as wireless speakers are expected to see “double-digit growth” by the end of this year. This is especially notable for Apple now that the HomePod and AirPods are both staples of the audio market, while the company also reportedly has a pair of over-ear headphones in the works.

NPD also notes that the AirPods were the top-selling headphones of 2017 based on dollars and units, while Beats and Apple combined represent the “top-selling headphone brand of 2017” with 44 percent of dollar sales.

While often forgotten alongside the monster iPhone industry, Apple is quietly building up a solid audio business on the side. Unfortunately, the company won’t break out sales of the HomePod, but rather will roll it into the “Other” category, which includes things like Apple TV, AirPods, and Apple Watch.

Further, if taken together, Beats and Apple were the top-selling headphone brand of 2017, accounting for 44 percent of all dollar sales.

Are you a HomePod or AirPods user? Will you be a buyer of Apple’s over-ear headphones? Let us know down in the comments!