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31 In this thesis, two key-techniques of high-resolution imaging sonar are studied: beam-forming and acoustical image processing.

32 When he compared people's ratings with acoustical analysis of the meows, he found very clear patterns.

33 Equipped with electronic intelligence (ELINT), bow-mounted sonar, optical and acoustical surveillance systems, the ship was designed to collect foreign ship intelligence in offshore waters.

34 The statistically optimal planar near-field acoustical holography (SOPNAH) was introduced, a simple and effective method was proposed to choose the wave number vector.

35 Using acoustical holography, some interesting results are shown about the different noises of a high speed vehicle, such as engine noise, tire noise and aerodynamic noise.

36 In this paper, a study on planar near-field acoustical holography scan measurement method and how window function and K-space filter affect holography reconstruction is presented.

37 The mechanism for low noise asphalt pavement to lower tyre noise is analyzed. A acoustical model is put forward. The resonance frequency of sound wave is analyzed with Helmholtz resonator model.

38 This article gives a survey on the current technology of the computer simulation of room acoustics, as known as the construction of virtual acoustical environment.

39 In the acoustical design, it can be used to control the reverberation time, eliminate echo, flutter echo, sound focusing etc.

40 The relation between clay - bearing carbonate rock acoustical and lithological characters was investigated under the air - saturated condition.

41 The acoustical behavior of a motorcycle exhaust muffler was simulated with the boundary element method.

42 Acoustical and lithological parameters of some clay - bearing carbonate cores were measured in the lab.

43 This paper presents a new technique named acoustical holography that can be used for analysis and study of noise.

44 Advanced acoustical signal processing needs high speed digital computation. The array processing becomes the main technique of signal processing.

45 This paper describes briefly the acoustical quality of Jilin gymnasium for ice skating activities, and acoustic measurements of perforated panel of G.

46 The relationship of decoration and acoustical design of on-air studio of radion station is elaborated.

47 Cooperate with R & D engineers, conduct mechanical and acoustical tests under direction of leading engineer.

48 The present status, the principle and application of auralization of room acoustical design are reviewed in this paper.

49 According to air horn design theory, JQF low noise air horn device with partial acoustical enclosure has been designed.

50 The relevance of acoustical principles is by no means limited to sound and hearing.

51 My factory,[www.Sentencedict.com] manufacturing and export the sale . 1 acoustical mineral fiber ceiling board.

52 In the paper, based on the require of acoustical environment and acoustics theory, the noise control way to it is introduced after detailed research and analysis, and had gotten ideal performance.

53 The mathematical model simulating beamforming acoustical holography has been built.

54 Total 97.84 % of QRS complexes were identified using the absolute error similarity, while 100% and 95.38% of ectopia waveform and acoustical noise, 98.13% of sinuses and supraventricular QRS complex.

55 A theoretical method to solve acoustical radiation modes and acoustical radiation efficiency of complex structure by a boundary element method and acoustical radiation theory is posed in this paper.

56 This paper presents the acoustical holography method which can be used to identify noise source on a moving vehicle.

57 So, there is a best choice for you to combine acoustical material together with interior decoration.

58 And the acoustical feedback of the secondary source is one of the key problems that affect noise reduction in ducts.

59 The pulsed argon laser thus obtained is used as a reconstruction light source for liquid surface acoustical holography, resulting in a greatly improved image quality.

60 Gregorian chant grew out of the acoustical characteristics of the Gothic cathedrals, and subsequently baroque music was written to accommodate the churches of the time.