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    • Member Info
      • Native Language:
      • Chinese
      • Home Country:
      • China
      • Current Location:
      • United States

    • Join Date: Mar 2013
    • Posts: 44
    #1

    'acoustic signal' or 'acoustical signal'?

    Hi,

    I am wondering if I should use 'acoustic signals' or 'acoustical signals' for sound signals.

    Thanks!

  1. Calis's Avatar
    • Member Info
      • Native Language:
      • British English
      • Home Country:
      • UK
      • Current Location:
      • UK

    • Join Date: Dec 2011
    • Posts: 172
    #2

    Re: 'acoustic signal' or 'acoustical signal'?

    In this case, it is "acoustic" signals. I can't think of a general rule as to "-ic" vs "-ical", so cases like these must be learned by rote.

    [Not a teacher]

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