公开(公告)号：US10197438B2

公开(公告)日：2019-02-05

申请号：US15513942

申请日：2015-06-15

Applicant: Goertek Inc.

Inventor： Dong Qiu ,  Xiaodong Cao

IPC: G01H15/00 ,  G10K11/162 ,  G10H3/00 ,  G01N29/09 ,  G01B17/00 ,  G01H3/00

Abstract: Disclosed are a device and a method for testing impedance characteristic and expansion performance of a sound absorption material. The device includes a first cavity and a second cavity which are both sealed. The first cavity is communicated with the second cavity through a slit channel. The second cavity is used for placing a sound absorption material therein. The device further includes a sound excitation source whose sounding face is located in the first cavity and used to provide a testing sound pressure. The device further includes two sound pickup sensors whose sound pickup surfaces are respectively arranged in the first cavity and the second cavity and respectively used to detect sound pressure in the first cavity and the second cavity. The device further includes a material for enclosing the first cavity and the second cavity is a hard sound insulation material.

公开(公告)号：US09877127B2

公开(公告)日：2018-01-23

申请号：US15501056

申请日：2015-12-07

Applicant: GOERTEK INC.

Inventor： Kang Ping ,  Xinfeng Yang ,  Dong Qiu

IPC: H04R29/00 ,  H04R3/04 ,  H03G3/30

CPC classification number: H04R29/001 ,  H03G3/3005 ,  H04R3/007 ,  H04R3/04 ,  H04R29/008

Abstract: A method and system for testing a temperature tolerance limit of a loudspeaker. The method includes: selecting a test signal, and determining a test output voltage as a rated voltage of the loudspeaker, so that the loudspeaker reaches a rated amplitude; determining a gain boosting frequency point according to a resonant frequency of the loudspeaker; performing a plurality of tests for the loudspeaker, and in each test controlling the test signal to maintain the gain constant in a frequency band lower than the gain boosting frequency point and increase the gain in a frequency band higher than the gain boosting frequency point, testing and recording a temperature of the loudspeaker till the loudspeaker fails, and recording a temperature at the time of the failure; and determining a highest temperature that is tolerable by the loudspeaker before the loudspeaker fails.

公开(公告)号：US20170276540A1

公开(公告)日：2017-09-28

申请号：US15513942

申请日：2015-06-15

Applicant: Goertek Inc.

Inventor： Dong Qiu ,  Xiaodong Cao

IPC: G01H15/00 ,  G01N29/09 ,  G10K11/162 ,  G01B17/00

CPC classification number: G01H15/00 ,  G01B17/00 ,  G01H3/00 ,  G01N29/09 ,  G01N2291/028 ,  G10K11/162

Abstract: Disclosed are a device and a method for testing impedance characteristic and expansion performance of a sound absorption material. The device includes a first cavity and a second cavity which are both sealed. The first cavity is communicated with the second cavity through a slit channel. The second cavity is used for placing a sound absorption material therein. The device further includes a sound excitation source whose sounding face is located in the first cavity and used to provide a testing sound pressure. The device further includes two sound pickup sensors whose sound pickup surfaces are respectively arranged in the first cavity and the second cavity and respectively used to detect sound pressure in the first cavity and the second cavity. The device further includes a material for enclosing the first cavity and the second cavity is a hard sound insulation material.

公开(公告)号：US10458953B2

公开(公告)日：2019-10-29

申请号：US15306467

申请日：2015-04-01

Applicant: GOERTEK INC.

Inventor： Dong Qiu ,  Chao Jiang

IPC: G01H13/00 ,  G01N29/12 ,  H04R7/12 ,  G01H3/00

Abstract: A method and a system for acquiring the natural frequency of a diaphragm, wherein, the method comprises: selecting test frequency points in a closed space, converting an electric signal into an acoustic signal, directing sound into the closed space, and acquiring the acoustic pressure of each test frequency point; adjusting the electric signal until the acoustic pressure of each test frequency point is the same; converting the adjusted electric signal into an acoustic signal; acquiring the displacement generated by the vibration of the diaphragm; and taking the frequency corresponding to the maximum displacement of the diaphragm as the natural frequency of the diaphragm. By adopting the method and system, the natural frequency of the diaphragm is determined by acquiring the maximum displacement of the diaphragm. Moreover, the process of acquiring the natural frequency of the diaphragm is not affected by surrounding environment, and therefore the acquired result is more accurate.