Wireless Telephony

Abstract

WIRELESS telephony has made such rapid progress during the past six or seven years that it must now be looked upon as a possible rival to wireless telegraphy for communication over distances up to a thousand miles. Although telephonic communication demands on normal occasions the expenditure of more power than does communication by Morse signs, yet the superior rapidity with which thought can be conveyed by voice transmission is a weighty advantage; and, besides, telephony often proves more successful than telegraphy when strays and analogous disturbances are bad, partly because the ear is so skilful in following the voice in the midst of other noises, and partly because the context greatly assists comprehension. Many of the recent improvements by which fhe present position in wireless telephony has been reached are due to the development of the thermionic vacuum valve with three electrodes—called., for short, the triode.