The following table summarizes the life, the gross carrying value and the related accumulated amortization of our acquired intangible assets (in millions):


			December 2022							June 2022
	Weighted Average Life in Years		Gross Carrying Value		Accumulated Amortization			Net Carrying Value		Gross Carrying Value		Accumulated Amortization			Net Carrying Value
Audio and video technology		5.6	$	231.9	$	(130.3	)	$	101.6	$	232.1	$	(109.3	)	$	122.8
Customer relationships		4.1		158.2		(101.4	)		56.8		170.5		(99.7	)		70.8
Wireless connectivity technology		5.7		128.0		(45.0	)		83.0		128.0		(33.8	)		94.2
Video interface technology		3.0		82.0		(66.0	)		16.0		82.0		(52.4	)		29.6
Human presence detection technology		5.0		5.2		(0.2	)		5.0		—		—			—
Licensed technology and other		4.4		10.8		(8.5	)		2.3		9.9		(7.5	)		2.4
Patents		8.0		4.4		(4.0	)		0.4		4.4		(3.7	)		0.7
Tradename		4.4		5.8		(4.2	)		1.6		5.8		(3.3	)		2.5
In process research and development	Not applicable			67.0		—			67.0		67.0		—			67.0
Acquired intangibles totals		4.9	$	693.3	$	(359.6	)	$	333.7	$	699.7	$	(309.7	)	$	390.0

The total amortization expense for the acquired intangible assets was $32.2 million and $29.2 million for the three months ended December 2022 December 2021, respectively, and $65.2 million and 54.4 million for the six months ended December 2022 and December 2021, respectively.

During the three months ended December 2022 and December 2021, $23.3 million and $19.9 million, respectively, and $46.8 million and $36.8 million for the six months ended December 2022 and December 2021, respectively, of amortization expense was included in our condensed consolidated statements of income in cost of revenue; the remainder was included in acquired intangibles amortization.