| 摘要 |
<p>Method and apparatus for locating and quantifying sound sources using an array of acoustic vector probes (200). Signals received at the probes are converted to digital form and fed into a digital signal processor (400) which computes the sound pressure and the sound-intensity vector at each probe. The set of sound-intensity vectors measured by the array provides a set of directions to a sound source (100) whose spatial coordinates are determined using a least- squares triangulation formula. The sound-intensity vectors also determine sound-power flow from the source. The vector probes are inexpensive and compact so that sound-intensity measurements can be made simultaneously at every position in an array enclosing a source. Hence the sound power of the source can be determined quite rapidly. In addition sound pressure measured by the probes can be phased to form a beam (250) for scanning a source. Sound- intensity measurements made concurrently can be used to determine the spatial coordinates of the part being scanned and the sound power radiated by that part. Results are displayed on a computer screen or other device (500) permitting an operator to interact with and control the apparatus. Additional related features and methods are disclosed.</p> |
