TY - CONF T1 - Acoustic and Ultrasonic Characterisation of Blockages and Defects in Underground Pipes JO - 2021 IEEE Sensors PY - 2021/10/31 AU - Towlson A AU - Yu Y AU - Sailor G AU - Horoshenkov K AU - Croxford A AU - Drinkwater B ED - DO - DOI: 10.1109/sensors47087.2021.9639823 PB - IEEE Y2 - 2025/04/09 ER -