Speaker back cavity

Patent metadata

Field	Value
Publication number	US-9800969-B2
Application number	US-201615077073-A
Country	US
Kind code	B2
Filing date	Mar 22, 2016
Priority date	Oct 22, 2013
Publication date	Oct 24, 2017
Grant date	Oct 24, 2017

Abstract

An apparatus including a sound transducer; and a housing having the sound transducer connected thereto. The housing forms a substantially sealed air space back cavity acoustically coupled to the sound transducer. The housing includes a housing member having a first dividing structure located in the back cavity to connect two adjacent air mass sections of the back cavity, where the dividing structure includes at least one aperture to permit travel of sound waves through the at least one aperture between the air mass sections.

First claim

What is claimed is:

1. An apparatus comprising:
a speaker; and
a housing member having the speaker connected thereto, where the housing member forms at least part of a back cavity acoustically coupled to the speaker, where the housing member comprises a dividing structure located in the back cavity between two adjacent air mass holding sections of the back cavity, where the dividing structure comprises at least one aperture to permit travel of sound waves through the at least one aperture between the two adjacent air mass holding sections, and where the dividing structure comprises two spaced elongate walls forming an elongate conduit therebetween at least partially forming the at least one aperture.

2. The apparatus as claimed in claim 1 where the housing member is a one-piece housing member having the dividing structure integrally formed with the one-piece housing member at a first side of the one-piece housing member, where the two adjacent air mass holding sections are located at the first side of the one-piece housing member.

3. The apparatus as in claim 1 where the housing member comprises a further dividing structure located in the back cavity to separate two other adjacent air mass holding sections of the back cavity.

4. The apparatus as claimed in claim 1 where at least one of the size, location and shape of the at least one aperture are selected so as to provide a tuning function.

5. The apparatus as claimed in claim 1 where at least one of the elongate walls is angled.

6. The apparatus as claimed in claim 1 where the housing member comprises integrally formed cavities which form at least part of the back cavity.

7. The apparatus as claimed in claim 6 where upstanding walls are provided surrounding the cavities and attached to another component to close the cavity.

8. The apparatus as claimed in claim 1 where the two adjacent air mass holding sections of the back cavity are located in a same plane along a first side of the housing member.

9. The apparatus as claimed in claim 1 further comprising means for smoothing frequency response of the speaker, where the means for smoothing frequency response comprises the dividing structure.

10. The apparatus as claimed in claim 1 further comprising:
a printed circuit board connected to the speaker;
at least one processor connected to the printed circuit board; and
at least one memory connected to the printed circuit board.

11. An electrical device comprising:
the apparatus as claimed in claim 10 ;
at least one electronic display connected to the printed circuit board; and
at least one battery connected to the printed circuit board.

12. A method comprising:
providing a speaker;
connecting a housing member to the speaker, where the housing member forms at least part of a back cavity acoustically coupled to the speaker, where the housing member comprises a dividing structure located in the back cavity between two adjacent air mass sections of the back cavity; and
where the dividing structure comprises at least one aperture to permit travel of sound waves through the at least one aperture between the two adjacent air mass sections, and where the dividing structure comprises two spaced elongate walls forming an elongate conduit therebetween at least partially forming the at least one aperture.

13. The method as claimed in claim 12 where the dividing structure is integrally formed with the housing member, and where the two adjacent air mass sections are located at a same exterior first side of the housing member.

14. The method as claimed in claim 12 where the housing member comprises a further dividing structure located in the back cavity to connect two other adjacent air mass sections of the back cavity.

15. The method as claimed in claim 12 where at least one of the size, location and shape of the at least one aperture are selected so as to provide a tuning function.

16. The method as claimed in claim 12 where the elongate walls are angled forming an angled joint between the two air mass sections.

17. The method as claimed in claim 12 where the two air mass sections of the back cavity are located in a same plane along a first side of the housing member.

18. An apparatus comprising:
a sound transducer; and
a structure having the sound transducer connected thereto, where the structure forms at least part of a back cavity for the sound transducer such that the back cavity forms an air space which is acoustically coupled to the sound transducer for the air space to provide a back cavity functionality for the sound transducer, where the structure comprises a dividing structure in the back cavity, where the dividing structure and at least part of a rest of the structure form, at least partially, two adjacent air mass sections, where the dividing structure is located between the two adjacent air mass sections, where the dividing structure comprises at least one aperture to permit travel of sound waves through the at least one aperture between the two adjacent air mass sections, where the dividing structure comprises a first wall, a second wall and an intermediate gap between the first and second walls forming at least a portion of the at least one aperture as an elongate tuned conduit area between the two adjacent air mass sections.

19. The apparatus as in claim 18 where the dividing structure is part of a one-piece housing member having the dividing structure integrally formed with the one-piece housing member at a first side of the one-piece housing member, where the two adjacent air mass sections are located at the first side of the one-piece housing member.

20. The apparatus as in claim 19 where the one-piece housing member comprises a further dividing structure located in the back cavity to connect two other adjacent air mass sections of the back cavity.

21. The apparatus as in claim 20 where the further dividing structure comprises a dividing wall having a plurality of apertures therethrough.

22. The apparatus as in claim 19 further comprising at least one member connected to the structure to form the back cavity, where the at least one member is connected to ends of walls of the structure along a common plane.

23. The apparatus as in claim 22 where the at least one member comprises a printed circuit board.

24. The apparatus as in claim 18 further comprising:
a printed circuit board connected to the sound transducer;
at least one processor connected to the printed circuit board; and
at least one memory connected to the printed circuit board.

25. An electrical device comprising:
the apparatus as claimed in claim 24 ;
at least one electronic display connected to the printed circuit board; and
at least one battery connected to the printed circuit board.

26. A method comprising:
providing a sound transducer;
connecting a member to the sound transducer, where the member comprises a wall structure establishing a perimeter of a back cavity area for the sound transducer, where the wall structure is on a single first side of the member, where the member comprises a dividing structure located in the back cavity area connecting two adjacent air mass sections of the back cavity area; and
connecting the wall structure to at least one second member to at least partially close the back cavity area, where the wall structure and the dividing structure attach to the at least one second member to form a back cavity which is ac

Assignees

• Nokia Corp
• Nokia Technologies Oy

Inventors

• Slotte Thomas Benedict
• Engberg Anders Johan

Classifications

• H04M1/035 Primary

  Improving the acoustic characteristics by means of constructional features of the housing, e.g. ribs, walls, resonating chambers or cavities · CPC title

• H04R1/2819 Primary

  for loudspeaker transducers · CPC title

• H04R2499/11

  Transducers incorporated or for use in hand-held devices, e.g. mobile phones, PDA's, camera's · CPC title

• H04R1/2849

  for loudspeaker transducers · CPC title

• H04M1/6041

  Portable telephones adapted for handsfree use · CPC title