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
Word of the day
international pitch
- the pitch used to tune instruments for concert performances; usually assigns 440 Hz A above middle C