聴講 (chōkō) means “lecture attendance”

More examples

公開講座を聴講するには、事前の申し込みが必要です。kō kai kō za o chō kō su ru ni wa ji zen no mō shi ko mi ga hitsu yō de su

Advance registration is required to audit the public lecture.

It describes joining a lecture for the purpose of listening and learning, not teaching or presenting.

受講jukō: Attendance at a class or course as a learner, often as an enrolled participant.

講義や講演などを聴くために出席すること。kō gi ya kō en na do o ki ku ta me ni shus seki su ru ko to

聴講 (chōkō) is a compound of 聴 (chō, "listen") and 講 (kō, "lecture"), so its form directly reflects listening to a lecture.

University notices may use 聴講 (chōkō) for attendance by people who listen to a class without being its regular enrolled students.