Welche Bedeutung steckt hinter der hier vorgestellten Vokabel aus dem Bereich Technical matters?

Leo: 'What's that constant whirr I can hear?' Jenny: 'I don't know. Is it my computer perhaps? I'd noticed it had got a bit louder lately.'

to whirr

Do you know what it means?

• to make a humming sound
• to make a banging noise
• to beep