JPS6465599A - Decelerated reproduction tape recorder for writing - Google Patents

Abstract

PURPOSE: To make words easy to hear by adding the output of two IC memories to a speaker through a D-A converter and an amplifier and transmitting a write and a read control signals, alternately in the periodical moment of a few seconds, to the write and read control circuit of the IC memories. CONSTITUTION: An analog reproducing voltage enters an A-D converter 18, where voltage at each point of time is converted to a digital signal and recorded in any one of the IC memories 19, 21. Then, the stored contents of the memory 19 are erased, with information from the converter 18 written in; also, the stored contents of the memory 21 are erased, with information from the converter 18 written in. Then, the stored contents of the memory 19 are read out and transmitted to the D-A converter 22, where digital information is converted to analog voltage, amplified by an amplifier 23 and converted to sound through a speaker 24. This sound has the same pitch as that of the original sound entered a microphone 12. Thus, a speech, conversation, etc., so recorded can be made easy to hear without changing the frequency of the sound.