Speech and speech processing

see also Gilbert Wright, under "vibration transducers"

Homer Dudley

• "Signal Transmission", Homer Dudley, US Patent 2151091. 1939
• "Sound Printing Mechanism", Homer Dudley, US Patent 2195081. 1940
• "Sound Record", Homer Dudley, US Patent 2243090. 1941
• "Production of Artificial Speech", Homer Dudley, US Patent 2243525. 1941
• "Production of Artificial Speech", Homer Dudley, US Patent 2243526. 1941
• "Production of Artificial Speech", Homer Dudley, US Patent 2243527. 1941
• "System for the Artificial Production of Vocal or Other Sounds", Homer Dudley, US Patent 2339465. 1944
• "Speech Analysis and Synthesis System", Homer Dudley, US Patent 2466880. 1949
• "Synthesis of Speech from Code Signals", Homer Dudley, US Patent 2771509A. 1956
• "Secret Telephony", Homer Dudley, US Patent 3985958. 1976

From others

• "Device for Artificially Generating Speech Sounds by Electrical Means", Roelof Vermeulen, US Patent 2458227. 1949
• "Audio Nonsense Generator", A. M. Reiter, US Patent 3059054. 1964
• "Speech Privacy System", Manfred Schroeder, US Patent 3328526. 1967
• "Helium Speech Unscrambler", Larry Jefferies, US Patent 3584158. 1971
• "Electroventriloquist", S. P. Asija, US Patent 4107462. 1978
• "Removing Reverberative Echo Components in Speech Signals", David Berkley, US Patent 4166924. 1979. reduced via center clipping
• "Underwater Communications Device", D. W. Williams, US Patent 4183422. 1980
• "Method to Electronically Clarify Picture or Sound Information and an Arrangement to Carry out the Method", Lars Liljeryd, US Patent 4731852. 1988