harmonica bug

短语

词形变化

harmonica bugs 复数 harmonica bugs

释义与例句

n.
  1. 1.

    An electronic eavesdropping device (bug) that attaches to a landline telephone and is activated or deactivated by a specific tone. When activated, it prevents the telephone from ringing but activates its microphone to transmit to another telephone at a remote location.

词源

From harmonica for the tone that activates or deactivates the device, and bug (an electronic eavesdropping device).

来源：wiktionary