Random good picture Not show

31. The formula of reverberation time by W. C. Sabine is a foundation of architectural acoustics.

32. Sub-band Adaptive Filtering (SAF) algorithm is a major method to deal with the acoustic echo cancellation (AEC) problem with long reverberation time.

33. The impulse response of a digital reverberation processor often has a very long length, which makes the real-time processing very difficult with small error(sentencedict.com/reverberation.html), store and delay.

34. The paper establishes reverberation - anechoic chamber sound insulation test method via lot of test research and demonstration.

35. And the other is to calculate K3 by reverberation time T of simply constructed semi-anechoic room.

36. The lower window shows the calculated reverberation times table for the upper frequency range.

37. From the point of field uniformity, the field uniformity of reverberation chamber with each material can satisfy the requirement of Standard IEC61000-4-21.

38. In this paper, the eigenfunction addition method is employed to solve electromagnetic fields in an EMC reverberation chamber, and the field structure is built and a clear physical concept is obtained.

39. Methods The experiments of electromagnetic radiation effects of respirator were done in the reverberation chamber.

40. Therefore, this thesis attempts to develop reverberation chambers to evaluate antenna's efficiency.

41. A laboratory test is carried out to study the relationship between the clarity of Mandarin monosyllable and STI-PA caused only by reverberation.

42. The technology of the reverberation chamber for EMC test is introduced in details. The technology includes the chamber calibration and the qualification of the performance parameters.

43. Traditional Methods : To measure absorption coefficient are standing wave tube and reverberation which have some shortcomings.

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

45. The progresses of the formulae, measuring techniques, acoustic evaluating and design of reverberation time are studied.

46. Finally, as an example, sound energy density and reverberation time in a rectangle cavity are calculated and compared with those given by experiment respectively.

47. Recently in the analysis of active sonar signal detecting performance, the statistical model of reverberation envelope is assumed to be in accord with Rayleigh-distribution in computer simulation.

48. Reverberation time is one of the important objective parameters for evaluating acoustics in concert halls.

49. Just before dawn he was assisted in waking by the abnormal reverberation of familiar music.

50. This paper had introduced the technology of electromagnetic compatibility measurement in Reverberation - Chamber.

51. Reverberation time is not only an important index in architectural acoustics design, but also an important parameter to appraise gyms' timbre quality.

52. This paper is concerned with the optimum waveforms foe detection in reverberation environment, under a maximum detection factor criterion with an energy constraint.

53. Based on the Reverberation Method and introducing a model of joint mass-damping, the vibration suppression of frame structures is investigated in this paper.

54. Sound power determination in reverberation chambers is discussed in the light of normal mode theory. Rigorous as well as statistical formulas are found, and the aged problem of.

55. The reverberation time is the most basic comment of the tone chamber.

56. With this method applied the separation of the AM sine pulse from the ideal chaotic signal and from the measured reverberation of the lake bottom are implemented.

57. Finally, the marine reverberation output oscillogram is obtained through exciting the white gauss noise.

58. In neritic area, the variable period reverberation caused by seabed terrain fluctuation is the main disturbance factor to the seis- mic data quality.

59. The reverberation time was probably slightly less than 1.6 seconds when fully occupied.

60. We introduce reverberation chamber and it's features in size, shielding material and paddles.