The police planted/installed a listening device in the home of the suspected mobster.警方在犯罪嫌疑人家里安装了监听装置。The police obtained permission to implant a recording device in the suspect's home.警方获准在嫌疑犯家中安装监听装置。They were both aware that there might be listening devices hidden in the room.他们俩都意识到房间里可能藏匿了监听装置。