The inventor of the Sound educator, Mr E. Thorp Hincks, pictured with his invention which subjected the ear to the recurrence of sounds whose pitch, intensity and timbre had been selected expressly for the purpose.

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Creative#:

TOP23899184

Source:

達志影像

Authorization Type:

RM

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須由TPG 完整授權

Model Release:

No

Property Release:

No

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No

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