Mic problem in ubuntu

Suddenly my laptop mic not working in ubuntu 21.4 . Perfectly working in windows10 . I changed the sound setings and noting happend. My laptop is dell Inspiron 15 3501

This looks like a support request.

This site is for the co-ordination of the Ubuntu project(s), and other non-support matters.

For Ubuntu Support options, please have a look at https://community.ubuntu.com/t/finding-help/709

Note: Ubuntu 21.04 doesn’t get released until 2021-April, until then it’s the development release (hirsute), with a number of support sites not accepting support questions, and instead will suggest you file bugs (or wait until it’s officially released). To file a bug refer https://help.ubuntu.com/community/ReportingBugs. For support you’ll have to limit yourself to sites that support #ubuntu+1 (the development release; IRC, Ubuntu Forums…)