A phone on the wall beside him beeped twice.

The metal detector beeped twice, once for each of them but not for me.

The metal detector beeped twice, once for him, once for me.

As he pulled it open his mobile, which he had left inside, beeped twice.

The mechanism beeped twice and the door unlocked.

The jitney's computer beeped twice, and the door closed.

He was about to get some coffee when his communicator beeped twice.

As he did, it beeped twice again, then tinted green.

The printer beeped twice and then began spitting out paper.

The screen beeped twice, and the few seconds crawled by like lead snails before she answered the call.