To provide a novel voice encryption device and the like in which attention is paid to encrypting soundwave, which is aerial vibration.
A voice encryption device 2 includes: a voice reception section 21 for receiving a voice belonging to an audible range; a mute section 22 for muting the voice received by the voice reception section 21 by converting the received voice to voice of a phase opposite to that of the received voice; an encryption section 23 for encrypting the voice received by the voice reception section 21 to voice belonging to an audible range other than that to which the received voice belongs; and a voice transmission section 24 for mixing the voice received by the voice reception section 21, the muted voice of an opposite phase, and the encrypted voice belonging to another audible range so as to transmit it.
| JP2012233942 | NOISE CANCEL UNIT |
| WO/2005/083676 | ACOUSTIC ABSORBER |
| JP2017062364 | PROBE MICROPHONE |
Toshifumi Onuki
Akihiko Eguchi
Kazuhiko Naito
Tetsuo Tsuchiya
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