高频语抗噪声通讯系统的研究

STUDY OF HI-FREQUENCY PHRASE ANTI-NOISE COMMUNICATION SYSTEM

详细叙述了高频语抗噪声通讯系统工作原理和研制思想。实验结果证明 ,该语音系统具有较强的抗噪声功能。高频语声级 85、90、95dB(A) ,分别对应环境噪声 95、10 0、10 5dB(A) ,语音可懂度达 90 %以上 ;高频语声级 90dB(A) ,舰船主机噪声 10 5dB(A)的现场试验 ,结果也达到 90 %。实验显示 ,噪声环境下使用高频语通讯 ,佩戴耳塞的效果优于裸耳。该系统在语音信号、环境噪声比为_10至_15dB时语音可懂度达 90 %以上 ,突破了传统的语言传递遵循部位机理的信号环境噪声比必须为 +

The principle of Hi_frequency phrase anti_noise communication system and its developing idea are described.The intelligibility in the laboratory and on the shipboard is studied,which is intended to prove that the system is provided with powerful anti_environmental noise function.The intelligibility is tested in a laboratory with Hi_frequency phrase levels at 85、90、95dB(A) under the environment of noise levels of 95、100、105dB(A),meanwhile the intelligibility for Hi_frequency phrase 90dB(A) is tested in a main engine cabin with 105.5dB(A).The experiments show that intelligibility reaches above 90% when the speech_to_noise ratio is -10 to -15dB.The classical viewpoint that a speech_to_noise ratio should be over +5dB in normal speech communication is challenged.