What was the general result when Johann Philipp Reis attempted to transmit speech using his 1861 apparatus?

Answer

Speech was often unintelligible, described as crackles and clicks.

While Reis’s invention could transmit musical tones, speech transmitted through his device was often unintelligible, described as a series of crackles and clicks.

What was the general result when Johann Philipp Reis attempted to transmit speech using his 1861 apparatus?
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