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Sound masking apparatus and sound masking method

A sound masking and sound masking technology, applied in the direction of sound-generating devices, instruments, electrical components, etc., can solve the problems of uncomfortable listeners, unpleasant sounds, and unpleasant echoes of forest sounds

Inactive Publication Date: 2016-10-05
YAMAHA CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the start timing of wave sound reproduction is randomly changed for each of the masking sound output devices, the timing of the sound pressure level of the wave sound is changed, thereby losing the original periodicity of the wave sound, resulting in an unpleasant sound
When a non-periodic sound such as a woodsy sound is emitted at a randomly set timing, an unpleasant reverberation of the woodsy sound appears in the space according to the timing, which means that the unpleasant sound resonates and makes the listener uncomfortable

Method used

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  • Sound masking apparatus and sound masking method
  • Sound masking apparatus and sound masking method
  • Sound masking apparatus and sound masking method

Examples

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Embodiment Construction

[0014] figure 1 is a block diagram showing the configuration of the sound masking device 1 according to the embodiment of the present disclosure. The sound masking device 1 is installed in, for example, a hotel lobby. The sound masking device 1 emits masking sounds from N output systems. Note that although N can be any natural number, N=4 in the current embodiment. In the current embodiment, a mixture of disturbing sound and non-disturbing sound is used as masking sound, and ambient sound is used as non-disturbing sound. like figure 1 As shown, the sound masking apparatus 1 includes a masking sound generator 10, an operating member 20, and speakers 30_1 to 30_n (n=2 to N) serving as N output systems. Since N=4 in the current embodiment, the speakers 30_1 to 30_n may also be referred to as "speakers 30_1 to 30_4".

[0015] The operating member 20 and the speakers 30_1 to 30_n are similar to those used in conventional sound masking apparatuses, and will be briefly described...

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Abstract

The invention provides a sound masking apparatus includes a reproduction processor configured to detect periodicity in a masker sound and add a delay to the masker sound in accordance with a detection result of the periodicity. The sound masking apparatus can prevent an unbalanced sound pressure distribution of masker sounds within an acoustic space without causing discomfort to a listener.

Description

technical field [0001] The present disclosure relates to a technique for preventing sound from being overheard by utilizing a masking effect. Background technique [0002] As used herein, the term "masking effect" refers to a phenomenon in which a normally clearly audible sound is masked by another sound and thus becomes inaudible. An exemplary technique for preventing sounds from being overheard using masking effects is the use of sound masking devices. A sound masking device emits masking sound into an acoustic space so that it is difficult for a third party to hear the voice of a specific speaker or a conversation between specific speakers in the acoustic space. Specific examples of the masker sound include: disturbance sounds; non-disturbance sounds such as ambient sounds; and a mixture of disturbance sounds and non-disturbance sounds. As used herein, the term "jammer" refers to meaningless or incomprehensible sounds formed by scrambling human voices. Disturbing sound...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10K11/175
CPCG10K11/1752H04K3/41H04K3/825H04K2203/12H04R3/04H04R29/00
Inventor 秦雅人山川高史
Owner YAMAHA CORP