Masking sound generating apparatus, storage medium stored with masking sound signal, masking sound reproducing apparatus, and program
US9390703B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 25, 2011 |
| Grant date | Jul 12, 2016 |
| Priority date | — |
| Expiry date | Aug 21, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04K2203/12
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
Whereas a high masking effect can be secured in a space to which a masking sound is emitted, the degree of a discomfort a person existing in the space suffers can be reduced. In superimposition processing, a CPU 21 extracts sound signals in different intervals of a sound signal X12-n of a human voice, superimposes the extracted sound signals on each other on the time axis, and outputs a resulting superimposed sound signal X13-n. In shift and addition processing, the CPU 12 interchanges a sound signal, before a reference position, of a sound signal X16-n and a sound signal, after the reference position, of the sound signal X16-n (shift processing) and outputs a sound signal X17-n obtained by adding together a shift-processed sound signal X16′-n and the original, non-shift-processed sound signal X16-n.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.