How an escort's own weapons could damage ASDIC

When an escort's own attack damaged ASDIC, was the problem acoustic interference or physical damage to the equipment?

It could be physical damage: a close explosion could harm the thin sonar dome, allowing rushing water to create disabling noise.

Damage to ASDIC could mean physical harm to the listening installation rather than temporary acoustic masking alone. Early forward-thrown charges could detonate too close when the range estimate was wrong. Their shock could damage the relatively thin metal dome that had to admit sound while holding a protective layer of water. Once the dome was compromised, rushing water created noise that degraded the set's ability to listen. The weapon, fire-control estimate, and sensor installation therefore had to be developed as one system.