Iot microphone?

Please help! I want to build a microphone that I can listen into over internet as a pet monitor . I don’t want video just audio. Perhaps a raspberry pi web server with microphone array.
Or does anyone know if there is a microphone one can buy that can plug into router and access with an IP address?

Thank you so much for help.

These pet cameras with two-way sound are pretty low-cost:

I'm pretty sure you could find an esp8266 project that you could customize as well:

Thank you DrG will try something along those lines!