公开(公告)号：US5625684A

公开(公告)日：1997-04-29

申请号：US206462

申请日：1994-03-04

Applicant: Anthony F. Matouk ,  Dieter Enzmann ,  Ahmet Karakasoglu

Inventor： Anthony F. Matouk ,  Dieter Enzmann ,  Ahmet Karakasoglu

IPC: A61F5/56 ,  G10K11/178 ,  H04M1/19 ,  H04M1/00

CPC classification number: A61B5/7475 ,  A61F5/56 ,  G10K11/1784 ,  G10K11/1788 ,  H04M1/19 ,  G10K2210/10 ,  G10K2210/108 ,  G10K2210/1081 ,  G10K2210/111 ,  G10K2210/116 ,  G10K2210/117 ,  G10K2210/12 ,  G10K2210/3039 ,  G10K2210/3221

Abstract: System for use by a caller and a recipient of a telephone call for suppressing environmental noise in the vicinity of a telephone comprising a telephone handset forming a part of the telephone. The telephone handset has a human voice sensor for picking up human sounds generally in one direction, and creating a first electrical signal. A speaker capable of producing substantially directional human voice sounds is provided. A second sound sensor is carried by the handset and has sound pick-up capabilities from a direction which is generally opposite said one direction for picking up external environmental noise in the vicinity of the handset and producing a second electrical signal having a frequency and amplitude. Electrical circuitry is provided for processing the second electrical signal to provide a third electrical signal of the same frequency as the second electrical signal but of opposite amplitude and sign and for combining the third electrical signal with the first electrical signal to suppress environmental noise present in the first electrical signal so that the recipient will receive an electrical signal in which the environmental noise in the vicinity of the caller has been suppressed.

Abstract translation: 用于由呼叫者和电话接收者使用的用于抑制包括形成电话的一部分的电话听筒的电话附近的环境噪声的系统。 电话听筒具有用于一般在一个方向拾取人类声音的人类语音传感器，并且产生第一电信号。 提供能够产生大体定向的人声音的扬声器。 第二声音传感器由手机携带，并且具有从通常与所述一个方向相反的方向的拾音能力，用于拾取手机附近的外部环境噪声，并产生具有频率和幅度的第二电信号。 提供电路用于处理第二电信号以提供与第二电信号相同频率但具有相反幅度和符号的第三电信号，并且用于将第三电信号与第一电信号组合以抑制存在于第二电信号中的环境噪声 第一电信号，使得接收者将接收到呼叫者附近的环境噪声被抑制的电信号。

公开(公告)号：US4669122A

公开(公告)日：1987-05-26

申请号：US744734

申请日：1985-06-14

Applicant: Malcolm A. Swinbanks

Inventor： Malcolm A. Swinbanks

IPC: G10K11/178 ,  H04R1/28

CPC classification number: G10K11/1782 ,  G10K2210/111 ,  G10K2210/112 ,  G10K2210/3011 ,  G10K2210/3044 ,  G10K2210/3219

Abstract: Sound in ducts can be reduced by using two cancelling sources spaced along the duct, and in order to reduce reflections upstream of the cancelling sources, sounds from these sources may be arranged to be in phase opposition upstream from the sources at all frequencies. Such an arrangement does not provide cancellation downstream at some frequencies. In the invention sound detected by a microphone is processed to generate a drive signal for a first source which tends to cancel sound in the duct partially, the remainder of the cancellation being provided by a sound source. A delay positioned between the sources is such that sounds from these sources are in phase at all frequencies of interest downstream of the second source.

Abstract translation: 可以通过使用沿着管道间隔开的两个消除源来减少管道中的声音，并且为了减少消除源的上游的反射，来自这些源的声音可以被布置成在所有频率处与源的上游相位相反。 这种布置在某些频率下不提供下游的取消。 在本发明中，处理由麦克风检测到的声音以产生用于第一源的驱动信号，其倾向于部分地消除导管中的声音，其余的消除由声源提供。 位于源之间的延迟使得来自这些源的声音在第二源的下游的所有感兴趣的频率处于同相。