Sound masking method and system
阅读：805发布：2022-07-27
专利汇可以提供Sound masking method and system专利检索，专利查询，专利分析的服务。并且A method and apparatus for masking sound comprising, receiving in an area an original sound signal which has to be masked. The original sound signal is then delayed to produce a time-delayed signal. The time-delayed signal is amplified and emitted outside the said area whereby the original sound signal will combine with the amplified time-delayed signal to produce a substantially unintelligible sound outside the said area.，下面是Sound masking method and system专利的具体信息内容。
1. A method of masking sound comprising the steps of i. receiving in an area an original sound signal which has to be masked, ii. delaying said original sound signal two or more times wherein to produce a time delayed substantially unintelligible signal having two or more delayed original signal components each one following the other at specific time intervals, iii. amplifying said time-delayed unintelligible signal, and iv. emitting said amplified time-delayed unintelligible signal outside said area whereby said original sound signal will combine in free space with said amplified time-delayed signal to produce a substantially unintelligible sound outside said area.
1. A method of masking sound comprising the steps of i. receiving in an area an original sound signal which has to be masked, ii. delaying said original sound signal two or more times wherein to produce a time delayed substantially unintelligible signal having two or more delayed original signal components each one following the other at specific time intervals, iii. amplifying said time-delayed unintelligible signal, and iv. emitting said amplified time-delayed unintelligible signal outside said area whereby said original sound signal will combine in free space with said amplified time-delayed signal to produce a substantially unintelligible sound outside said area.
2. A method as claimed in claim 1 wherein said original sound signal is a voice signal.
3. A method as claimed in claim 2, wherein said voice signal is delayed two or more times at intervals of 0.1 to 0.3 seconds approximately.
4. A method as claimed in claim 2 wherein step (iv) includes emitting said amplified time-delayed signal at a desired masking level at one or more locations outside of said area, said time-delayed signal having substantially the same frequency components and loudness as said original signal.
5. A method as claimed in claim 2 wherein there is further comprised the additional step of damping said original signal and said delayed signal in the region between receiving means and sound emitting means.
6. A sound masking system comprising receiver means sound signal receiving an original sound signal from an area, two or more time delay means connected to said receiver means and each receiving said original voice signal, each said time delay means having a different time delay and having a common output to produce a time-delayed substantially unintelligible signal having two or more time-delayed original signal components each one delayed from another at specific time intervals, an amplifier connected to said common output of said time delay means for amplifying said time-delayed signal, and one or more loudspeakers connected to said amplifier to emit said amplified time-delayed substantially unintelligible signal outside said area whereby said original sound will combine in free space with said amplifier time-delayed signal to produce a substantially unintelligible sound outside said area.
7. A sound masking system as claimed in claim 6 wherein said original signal is a voice signal and wherein said delay means are delay circuits.
8. A sound masking system as claimed in claim 7 wherein said original voice signal is delayed two or more times at specific time intervals of 0.1 to 0.3 seconds approximately.
9. A sound masking system as claimed in claim 7 wherein said emitted time-delayed signal has substantially the same frequency components and is adjustable to produce a loudness level substantially the same as said original voice signal.
10. A sound masking system as claimed in claim 7 wherein said receiver means comprises one or more microphones mounted in one or more locations within said area, said one or more loudspeakers being mounted on one or more acoustic screens to emit said unintelligible sound outwardly of said screens and said area.
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