Masking sound generating apparatus, storage medium stored with masking sound signal, masking sound reproducing apparatus, and program

摘要

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.

主权项

1. A masking sound generating apparatus comprising:
an acquiring unit for acquiring a sound signal sequence Xacq which represents a speech; and a generating unit that includes:
a superimposing unit for:
extracting plural sound signal sequences in different intervals of a subject sound signal sequence Xsubj, the subject sound signal sequence Xsubj based on the acquired sound signal sequence Xacq, andsuperimposing the extracted sound signal sequences on each other on the time axis into a superimposed sound signal sequence Xsuperimp such that the order of phonemes in each of the different intervals remains the same as in the acquired sound signal sequence Xacq, wherein the generating unit is provided for generating a masking sound signal based on the superimposed sound signal sequence Xsuperimp.