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Pulse-response-based room sound propagation path separation method

A technology of transmission path and separation method, which is applied in the field of room acoustics, can solve the problems of providing direct and accurate information, limited and limited analysis, etc. in the acoustic design of open offices

Active Publication Date: 2016-08-24
NANJING UNIV
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Problems solved by technology

The above patents give some ideas and methods to improve the privacy of language in the office, but they are all limited to qualitative analysis, and there is no way to provide direct and accurate information on the acoustic design of the open office

Method used

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  • Pulse-response-based room sound propagation path separation method
  • Pulse-response-based room sound propagation path separation method
  • Pulse-response-based room sound propagation path separation method

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Embodiment Construction

[0042] The implementation case is carried out in an open office of 16.5m × 30.9m × 5.1m, and a wooden top open box with a size of 1.00m × 0.74m × 1.36m is used to represent an independent meeting room in the open office. By using the method of the invention, the acoustic contributions of the diffraction path, the ceiling reflection path, the ground reflection path, etc. in the open office are given, so as to provide a design reference for improving its language privacy.

[0043] according to figure 1 The schematic diagram of the instrumentation is shown to build the measurement system. B&K's 7841 commercial room acoustic software Dirac is used to measure the impulse response, and the supporting instruments include B&K's ZE0948 USB interface, G.R.A.S's 12AA power amplifier, B&K's 4166 microphone; B&K's 2270 handheld acoustic The level meter measures the sound pressure level and background noise, and the supporting instrument is the 4189 microphone of B&K Company. All instrume...

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Abstract

The invention, which relates to the acoustic field of the room, discloses a pulse-response-based room sound propagation path separation method. According to the technical scheme, the method comprises: measurement is carried out to obtain a pulse response in a room; after the time-domain windowing cut-off operation and frequency-domain filter processing are executed on the pulse response, division of pulse response energy of the obtained part and total pulse response energy is carried out to obtain ratio values of acoustic energy of designated transmission paths to total acoustic energy; and then contributions of all acoustic propagation paths to a total sound pressure level in the room are separated and thus quantitative results of language privacy influences by all paths are obtained. With the method, the obtained acoustic propagation path separation result of the room can be used for an acoustic design of a newly open office or acoustic modification of an existing open office. The method has the following advantages: the universal and simple performances are good; the method is suitable for any room; no complicated theoretic modeling process is required; the method is easy to operate; and the result is reliable.

Description

1 Technical field: [0001] The invention relates to the field of room acoustics, in particular, an impulse response-based separation method for room sound propagation paths, which is mainly applied to the analysis of language privacy in open offices and provides reference for acoustic design of open offices. 2 background technology: [0002] The open office is a form of large-space office space with flexible partitions. It has the advantages of low cost and high flexibility, and is widely used in modern society. However, its openness has also caused problems such as low language privacy in the office and voice conversations that easily disturb others. While maintaining the advantages of an open office, how to scientifically and reasonably design the acoustic parameters of the room to obtain good language privacy has always been a technical hotspot. [0003] Patent 99201617.7 provides an office partition device that can be assembled arbitrarily, which makes the partition of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10L21/0308
CPCG10L21/0308
Inventor 於静霞王淑萍邱小军
Owner NANJING UNIV
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