Page 109 - 应用声学2019年第5期

第 38 卷 第 5 期 高春丽等： 环形扬声器阵列的警报系统设计 861

号进行反复实验，实验中音频指向性明显，同时验证
ܦጟ
ᝠ
了整个系统的可行性。
ܦጟ
ܦጟ
ᝠ ᝠ
1.5 m 参 考 文 献
[1] Aarts R M, Janssen A J E M. On-axis and far-field sound
ܦጟ ܦጟ
ᝠ ᝠ radiation from resilient flat at and dome-shaped radia-
tors[J]. Journal of the Acoustical Society of America, 2009,
ړဗ᫼ 125(3): 1444–1455.
[2] Shabtai N R, Behler G. Generation of a reference radia-
ܦጟ ܦጟ
ᝠ ᝠ tion pattern of string instruments using automatic excita-
tion and acoustic centering[J]. Journal of the Acoustical
ܦጟ
ᝠ Society of America, 2015, 138(5): 480–486.
[3] 胡文林. 各向异性超常材料的声幻象结构和声透镜研究 [D].
(a) ࠄᰎ᝺Ꮆᇨਓڏ
北京: 中国科学院大学, 2013.
[4] Carter B, Mancini R. 运算放大器权威指南 [M]. 姚建清, 译.
北京: 人民邮电出版社, 2010.
[5] 朱乔茜. 基于扬声器阵列的鲁棒性区域重放研究 [D]. 北京:
中国科学院大学, 2017.
[6] Elliott S J, Cheer J, Choi J W, et al. Robustness and
regularization of personal audio systems[J]. IEEE Trans-
actions on Audio Speech & Language Processing, 2012,
ړဗ᫼ ܦጟᝠ 20(7): 2123–2133.
(b) ࠄᰎဘڤ [7] Simón G M F, Elliott S J, Cheer J. A superdirective array
图 4 实验布置情况 of phase shift sources[J]. Journal of the Acoustical Society
of America, 2012, 132(2): 746–756.
Fig. 4 Experimental arrangement
[8] Betlehem T, Withers C. Sound field reproduction with
energy constraint on loudspeaker weights[J]. IEEE Trans-
100
actions on Audio Speech & Language Processing, 2012,
500 Hz
95 20(8): 2388–2392.
800 Hz
1 kHz
90 [9] Coleman P, Jackson P J B, Olik M, et al. Acoustic con-
trast, planarity and robustness of sound zone methods
ܦԍጟ/dB 85 using a circular loudspeaker array[J]. The Journal of the
80
Acoustical Society of America, 2014, 135(4): 1929–1940.
75 [10] Shin M, Fazi F M, Nelson P A, et al. Controlled sound
70 field with a dual layer loudspeaker array[J]. Journal of
Sound and Vibration, 2014, 333(16): 3794–3817.
65
0 30 60 90 120 150 180 210 240 270 300 330
[11] Gauthier P A, Camier C, Gauthier O, et al. Sound field
ᝈए/(O)
reproduction of real flight recordings in cabin mock-up[J].
图 5 实验结果图 Journal of the Audio Engineering Society, 2015, 63(1/2):
6–20.
Fig. 5 Experimental result [12] Choi J W, Kim Y H. Generation of an acoustically bright
zone with an illuminated region using multiple sources[J].
4 结论 Journal of the Acoustical Society of America, 2002, 111(4):
1695–1700.
[13] Olivieri F, Fazi F, Fontana S, et al. Generation of private
本文以高性能的DSP为控制核心，利用最小二
sound with a circular loudspeaker array and the weighted
乘法进行音频信号处理，通过 ADC 和 DAC 为 DSP pressure matching method[J]. IEEE/ACM Transactions
进行信号转换，实现音频信号的采集和输出，并实现 on Audio, Speech, and Language Processing, 2017, 25(8):
1579–1591.
了基于环形扬声器阵列的警报系统的局部警报功
[14] 蔡野锋. 基于扬声器阵列的局部声重放研究 [D]. 北京: 中国
能。在 500 Hz、800 Hz 和 1 kHz 三个频点的单频信 科学院大学, 2014.