Method for Removing Dust in Sound Outlet Hole of Loudspeaker, and Terminal Device

Patent metadata

Field	Value
Publication number	US-2019394591-A1
Application number	US-201916560537-A
Country	US
Kind code	A1
Filing date	Sep 4, 2019
Priority date	Mar 3, 2017
Publication date	Dec 26, 2019
Grant date	—

Abstract

A terminal device and a method for removing dust in a sound outlet hole of a loudspeaker are provided. The method includes the following: measuring a natural frequency of the loudspeaker, generating an audio file for removing dust according to the natural frequency, and prestoring the audio file for removing dust, wherein a vibration amplitude of a vibration diaphragm of the loudspeaker is at a maximum when the vibration diaphragm is driven to vibrates by an exciting current having the natural frequency; reading the prestored audio file for removing dust; and controlling the loudspeaker to play the audio file for removing dust, to generate air flow in the sound outlet hole, wherein when the loudspeaker plays the audio file for removing dust, a wind speed of the air flow through the sound outlet hole is at a maximum.

First claim

What is claimed is:

1 . A method for removing dust in a sound outlet hole of a loudspeaker, comprising:
measuring a natural frequency of the loudspeaker, generating an audio file for removing dust according to the natural frequency, and prestoring the audio file for removing dust, wherein a vibration amplitude of a vibration diaphragm of the loudspeaker is at a maximum when the vibration diaphragm is driven to vibrates by an exciting current having the natural frequency; reading the prestored audio file for removing dust; and controlling the loudspeaker to play the audio file for removing dust, to generate air flow in the sound outlet hole, wherein when the loudspeaker plays the audio file for removing dust, a wind speed of the air flow through the sound outlet hole is at a maximum.

2 . The method of claim 1 , wherein measuring the natural frequency of the loudspeaker comprises:
inputting exciting currents having a preset current value and various frequencies to a coil of the loudspeaker, to drive the vibration diaphragm of the loudspeaker to vibrate, wherein the air flow is generated in the sound outlet hole under the vibration of the vibration diaphragm; and recording a frequency of a first exciting current as the natural frequency of the loudspeaker, when a vibration amplitude of the vibration diaphragm excited by the first exciting current is at a maximum.

3 . The method of claim 2 , wherein generating the audio file for removing dust according to the natural frequency comprises:
setting a preset playing length for the audio file for removing dust; setting a preset sound intensity having a preset decibel value for the audio file for removing dust; and generating a mono-audio file for removing dust according to the first exciting current having the natural frequency, the preset playing length, and the preset sound intensity.

4 . The method of claim 1 , further comprising:
detecting whether the sound outlet hole of the loudspeaker is blocked; displaying a dust removal interface on a display of a terminal device to request a dust removal instruction, when the sound outlet hole of the loudspeaker is blocked, wherein the terminal device comprises the loudspeaker; and performing the action of reading the prestored audio file for removing dust, when the dust removal instruction is acquired.

5 . The method of claim 4 , further comprising:
detecting whether the sound outlet hole of the loudspeaker is blocked after the audio file for removing dust is played by the loudspeaker; and prompting a user to repair the loudspeaker when the sound outlet hole remains in a blocked state.

6 . The method of claim 5 , wherein detecting whether the sound outlet hole of the loudspeaker is blocked comprises:
inputting an exciting current for a hole blocking test to the coil of the loudspeaker to test the vibration amplitude of the vibration diaphragm of the loudspeaker; and determining that the sound outlet hole of the loudspeaker is blocked, when the vibration amplitude does not reach an amplitude value corresponding to the exciting current for the hole blocking test.

7 . The method of claim 5 , further comprising:
displaying a detection interface on the display of the terminal device for detecting whether the sound outlet hole of the loudspeaker is blocked, wherein the detection interface contains a control for a user to input a detection instruction; and performing the action of detecting whether the sound outlet hole of the loudspeaker is blocked, when the detection instruction is acquired.

8 . A terminal device, comprising a housing, a loudspeaker, a memory, and a processor, wherein the loudspeaker, the memory, and the processor are disposed in the housing, and wherein the processor is configured to:
measure a natural frequency of the loudspeaker, generate the audio file for removing dust according to the natural frequency, and prestore the audio file for removing dust in the memory, wherein a vibration amplitude of a vibration diaphragm of the loudspeaker is at a maximum when the vibration diaphragm is driven to vibrates by an exciting current having the natural frequency; read the prestored audio file for removing dust; and control the loudspeaker to play the audio file for removing dust, to generate air flow in a sound outlet hole of the loudspeaker; wherein when the loudspeaker plays the audio file for removing dust, a wind speed of the air flow through the sound outlet hole is at a maximum.

9 . The terminal device of claim 8 , wherein the processor configured to measure the natural frequency of the loudspeaker is configured to:
input exciting currents having a preset current value and various frequencies to a coil of the loudspeaker, to drive a vibration diaphragm of the loudspeaker to vibrate, wherein the air flow is generated in the sound outlet hole under the vibration of the vibration diaphragm; and record a frequency of a first exciting current as the natural frequency of the loudspeaker, when a vibration amplitude of the vibration diaphragm excited by the first exciting current is at a maximum.

10 . The terminal device of claim 9 , wherein the processor configured to generate the audio file for removing dust according to the natural frequency is configured to:
set a preset playing length for the audio file for removing dust; set a preset sound intensity having a preset decibel value for the audio file for removing dust; and generate a mono-audio file for removing dust according to the first exciting current having the natural frequency, the preset playing length, and the preset sound intensity.

11 . The terminal device of claim 8 , wherein the processor is further configured to:
detect whether the sound outlet hole of the loudspeaker is blocked; display a dust removal interface on a display of the terminal device to request to acquire a dust removal instruction, when the sound outlet hole of the loudspeaker is blocked; and perform the action of reading the prestored audio file for removing dust, when the dust removal instruction is acquired.

12 . The terminal device of claim 11 , wherein the processor is further configured to:
detect whether the sound outlet hole of the loudspeaker is blocked, after the audio file for removing dust is played by the loudspeaker, and prompt a user to repair the loudspeaker when the sound outlet hole remains in a blocked state.

13 . The terminal device of claim 12 , wherein the processor configured to detect whether the sound outlet hole of the loudspeaker is blocked is configured to:
input an exciting current for a hole blocking test to the coil of the loudspeaker to test the vibration amplitude of the vibration diaphragm of the loudspeaker; and determine that the sound outlet hole of the loudspeaker is blocked, when the vibration amplitude does not reach an amplitude value corresponding to the exciting current for the hole blocking test.

14 . The terminal device of claim 12 , wherein the processor is further configured to:
display a detection interface on the display of the terminal device for detecting whether the sound outlet hole of the loudspeaker is blocked, wherein the detection interface contains a control for a user to input a detection instruction; and perform the action of detecting whether the sound outlet hole of the loudspeaker is blocked, when the detection instruction is acquired.

15 . A non-transitory computer-readable storage medium storing a computer program which, when executed by a processor, causes the processor to:
measure a natural frequency of a loudspeaker, generate an audio file for r

Assignees

• Guangdong Oppo Mobile Telecommunications Corp Ltd

Inventors

• Ouyang Ling

Classifications

• H04R2400/00

  Loudspeakers · CPC title

• H04R3/00

  Circuits for transducers (arrangements for producing a reverberation or echo sound G10K15/08; amplifiers H03F) · CPC title

• H04R3/04

  for correcting frequency response · CPC title

• B08B7/026

  Using sound waves · CPC title

• H04R9/06

  Loudspeakers · CPC title