Bell Alexander Graham

Alexander Graham Bell

Bell

B0023700 (bĕl), Alexander Graham 1847-1922. British-born American inventor who received the first patent for the telephone (1876). Bell also invented the audiometer, an early hearing aid, and improved the phonograph.

Alexander Graham Bell

Bell

(bĕl), Alexander Graham 1847-1922. Scottish-born American scientist and inventor. Bell's lifelong interest in the education of deaf people led him to conceive the idea of transmitting speech by electric waves. In 1876 his experiments with a telegraph resulted in his invention of the telephone. He later produced the first successful sound recorder, called a graphophone. Bell also invented the photophone, which transmitted speech by light rays; the audiometer, an early hearing aid; and many other devices.

单词	bell alexander graham
释义	Bell Alexander Graham Alexander Graham Bell Bell B0023700 (bĕl), Alexander Graham 1847-1922. British-born American inventor who received the first patent for the telephone (1876). Bell also invented the audiometer, an early hearing aid, and improved the phonograph. Alexander Graham Bell Bell (bĕl), Alexander Graham 1847-1922. Scottish-born American scientist and inventor. Bell's lifelong interest in the education of deaf people led him to conceive the idea of transmitting speech by electric waves. In 1876 his experiments with a telegraph resulted in his invention of the telephone. He later produced the first successful sound recorder, called a graphophone. Bell also invented the photophone, which transmitted speech by light rays; the audiometer, an early hearing aid; and many other devices. IdiomsSeebell
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