Deborah Withington of Sound Alert says that the alarms use most of the frequencies that can be heard by humans.

该公司的戴博拉·威星顿称此种警报器使用人类可以听到的部分音频。

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About 500 people joined a protest against plans to close Withington Baths earlier this month.

BBC: Withington Baths

Miles Platting, Broadway, Levenshulme and Withington pools could shut this year, with Chorlton closing in 2015.

BBC: Levenshulme baths

Withington Leisure Centre is set to close along with pools in Miles Platting, Broadway and Levenshulme.

BBC: Protest over Manchester swimming pool closure plans