Ping \Ping\, n. [Probably of imitative origin.] The sound made by a bullet in striking a solid object or in passing through the air.
Source: Webster's Revised Unabridged Dictionary (1913)
Ping \Ping\, v. i. [imp. & p. p. Pinged; p. pr. & vb. n. Pinging.] To make the sound called ping.