sudo tcpdump -i en0 -n -l dst host 8.8.8.8 $(for a in $(curl -s https://raw.githubusercontent.com/berthubert/googerteller/main/goog-prefixes.txt); do echo or dst net $a; done) | while read; do tput bel; done

Link to read the list (remember to read what you curl | bash): https://raw.githubusercontent.com/berthubert/googerteller/ma...

You can reference it the same way espeak does https://github.com/danielbair/homebrew-tap/blob/0550bfcd3b11... (tap that repo, then install)

other option is to clone the repo but pipe the output to the terminal bell instead - probably not as good as the OPs solution but has a similar effect :)

    sudo tcpdump -n -l dst net 192.0.2.1/32 $(for a in $(cat goog-prefixes.txt); do echo or dst net $a; done) | xargs -I {} bash -c  "tput bel"

EDIT: it's definitely not as good as the OPs solution as the bells sometimes get skipped when there are lots of packets.