The period integrates speech science with telecommunication engineering, foregrounding production, perception, and development of speech across speakers and learners and linking to education and cognitive science. Carrier-based modulation and multi-carrier analysis emerge as core methods, examining sidebands, modulation techniques, and signal representation to enhance radio telephony and cable transmissions. System-level infrastructure and measurement frameworks frame long-distance circuits, ship radio extensions, directional antennas, network architectures, and standardized evaluation of transmission performance, including propagation in multi-signal environments. Influential Works: The Meaning of Meaning argued that language and symbols shape thought, catalyzing cross-disciplinary semantics and psycho-linguistics that later informed communication theory. The Art of Rhetoric mapped persuasive language, audience perception, and argument structure, shaping later studies in rhetoric and persuasion, while A Set of Postulates for the Science of Language offered foundational ideas for formal language science. The Immigrant Press and its Control analyzed how dominant groups shaped immigrant media, illuminating press power, censorship, and public opinion; Cipher Printing Telegraph Systems For Secret Wire and Radio Telegraphic Communications foreshadowed secure communications and cryptography.