 ITASCA, Ill.--BUSINESS WIRE--- KN earnings--Knowles Corporation NYSE: KN, a market leader and global provider of advanced micro-acoustic microphones, speakers, audio processing, and precision device solutions, will issue its first quarter 2021 financial results on April 22, 2021 immediately after market close followed by a conference call at 3:30 p.m. Central time 4:30 p.m. Eastern time to discuss the results. Analysts and investors are invited to join the conference call using the following information 