Speaker device
A speaker device for reproducing sound within a predetermined audio spectrum is provided. The speaker device comprises: a housing including a top, a bottom, and a side surface; at least one speaker disposed within the housing, the at least one speaker including a speaker flange facing towards the bottom; a waveguide including at least a first surface defining at least one sound channel for conducting a given sound produced by the at least one speaker, and the at least one channel includes a first zone, a second zone, and a third zone sequentially defined along a length thereof to provide for sound reproduction from 100 Hz to 20000 Hz.
1. A speaker device for reproducing sound within an audio spectrum including a low range, a middle range, and a high range, the speaker device comprising:
a housing including a top, a bottom, and a side surface;
at least one speaker disposed within the housing, the at least one speaker including a speaker flange facing towards the bottom;
a waveguide including at least a first surface defining at least one sound channel for conducting a given sound produced by the at least one speaker, wherein:
the first surface is defined in the bottom of the housing and includes a conical protrusion having an apex facing towards the speaker flange, the apex of the conical protrusion and a center of the speaker flange being located on a common axis substantially perpendicular to the bottom of the housing, such that the at least one channel includes a first zone, a second zone, and a third zone sequentially defined along a length thereof, wherein:
the first zone is defined at least by a first cross-sectional dimension of the at least one channel, along the side surface of the housing, between the apex of the conical protrusion and the center of the speaker flange, the first cross-sectional dimension having been determined such that resonance phenomena, within a frequency response to the given sound, at frequencies corresponding to the middle range and the high range are minimized;
the second zone is defined at least by a second cross-sectional dimension of the at least one channel, along the side surface of the housing, the second cross-sectional dimension having been determined such that an acoustic resistance of the given sound therewithin is maximized; and
the third zone is defined at least by a third cross-sectional dimension of the at least one channel, along the side surface of the housing, at an exit of the at least sound channel, the third cross-sectional dimension having been determined to correspond to a maximum wavelength value associated with the audio spectrum for producing a uniform sound field in a vicinity of the speaker device, within the audio spectrum.
2. The speaker device of claim 1 , wherein the uniform sound field is characterized by consistency of the frequency response of the speaker device to the given sound in the vicinity of the speaker device within the audio spectrum.
3. The speaker device of claim 2 , wherein the consistency of the frequency response of the speaker device is provided for at frequencies from around 100 Hz to around 20000 Hz of the audio spectrum.
4. The speaker device of claim 3 , wherein the consistency of the frequency response has been provided for by iteratively altering at least one of the second cross-sectional dimension and the third cross-sectional dimension of the at least one channel for determining respective optimal values thereof.
5. The speaker device of claim 4 , wherein the altering the at least one of the second cross-sectional dimension and the third cross-sectional dimension, at each iteration, is performed with a predetermined step, the predetermined step being selected from a predetermined step range from about 0.5 mm to about 1 mm.
6. The speaker device of claim 4 , wherein the second cross-sectional dimension has been determined to be from about 2 mm to about 4 mm.
7. The speaker device of claim 4 , wherein the third cross-sectional dimension has been determined to be from about 15 mm to about 20 mm.
8. The speaker device of claim 1 , wherein the third zone is further defined by gradual extension of the at least one sound channel from the second cross-sectional dimension to the third cross-sectional dimension thereof.
9. The speaker device of claim 8 , wherein the third zone is further configured for:
amplifying an amplitude of the given sound at at least some frequencies of the high range of the audio spectrum; and
attenuating the amplitude of the given sound at at least some frequencies of the low range and the middle range of the audio spectrum.
10. The speaker device of claim 9 , wherein the amplifying is from about 15 dB to about 20 dB.
11. The speaker device of claim 1 , wherein the first cross-sectional dimension is selected from a first predetermined distance range from about 2 mm to about 4 mm.
12. The speaker device of claim 1 , wherein the speaker flange is configured to house a concave membrane of the speaker device.
13. The speaker device of claim 1 , wherein the side surface of the housing further defines a bass reflex port, the bass reflex port being configured for minimizing one or more sound distortions to the given sound at frequencies corresponding to the low range of the audio spectrum.
14. The speaker device of claim 13 , wherein the one or more sound distortions include overtones and non-linear sound distortions of the given sound at frequencies corresponding to the low range of the audio spectrum.
15. The speaker device of claim 13 , wherein the bass reflex port is implemented as a Helmholtz resonator.
16. The speaker device of claim 13 , wherein the bass reflex port comprises at least one flare.
17. The speaker device of claim 13 , wherein the bass reflex port further comprises a damping cover.
18. The speaker device of claim 17 , wherein the damping cover comprises using an acoustically transparent fabric.
19. The speaker device of claim 18 , wherein the bass reflex port is configured for unloading sound pressure, caused by a given sound, off the speaker device at least at frequencies from about 150 Hz to about 200 Hz.
20. The speaker device of claim 1 , wherein the waveguide further includes a second surface protruding from the side surface at least partially over the first surface, and the second cross-sectional dimension and the third cross-sectional dimension of the at least one channel are defined as respective distances between the first surface and the second surface of the waveguide.