GALTON’S DELTA'S WHISTLE

\ɡˈɒltənz dˈɛltəz wˈɪsə͡l], \ɡˈɒltənz dˈɛltəz wˈɪsə‍l], \ɡ_ˈɒ_l_t_ə_n_z d_ˈɛ_l_t_ə_z w_ˈɪ_s_əl]\

Definitions of GALTON’S DELTA'S WHISTLE

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international pitch

  • the pitch used to tune instruments for concert performances; usually assigns 440 Hz A above middle C
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