Speaker device
A device including a speaker and a housing, in which the speaker is configured to generate sound and includes a diaphragm and the housing encloses the speaker and includes a plurality of openings within one portion of the housing. The speaker is positioned within the housing to define a front chamber between the diaphragm and the one portion, and the plurality of openings are sized to collectively generate, with the front chamber, an increased output of the device within a frequency range of an output of the speaker corresponding to an alarm tone. Also provided are methods for assembling a device including a speaker and a housing.
1. A device comprising:
a speaker configured to output sound in the form of speech and an alarm tone, the speaker capable of generating an output within a frequency range of from 400 Hz to 4.0 kHz; and
a housing enclosing the speaker and including a plurality of openings within one portion of the housing, the speaker being positioned within the housing to define a front chamber between a diaphragm of the speaker and the one portion, the front chamber and the plurality of openings being arranged to create a resonator having a resonance frequency within a frequency range of the alarm tone to selectively increase a sound pressure level of a given output that includes the alarm tone, the increase being at least 6 dB and within a frequency range of 2.5 kHz to 2.7 kHz, the given output includes a peak in frequency amplitude falling within the frequency range of 2.5 kHz to 2.7 kHz.
2. The device of claim 1 , wherein the speaker comprises an electrodynamic speaker.
3. The device of claim 1 , wherein the output of the speaker comprises a peak output of the device within the frequency range of the output of the speaker corresponding to the alarm tone.
4. The device of claim 1 , wherein the one portion of the housing comprises a first end of the housing and wherein the front chamber comprises the plurality of openings within the one end of the housing but is otherwise acoustically sealed.
5. The device of claim 1 , wherein the speaker comprises a security alarm speaker.
6. A method for assembling a device, the method comprising:
providing a speaker and a housing, the speaker configured to output sound in the form of speech and an alarm tone, and the housing comprising a plurality of openings within one portion, wherein the speaker is capable of generating an output within a frequency range of from 400 Hz to 4.0 kHz;
assembling the housing and the speaker to form the device such that the housing encloses the speaker and the speaker is positioned within the housing to define a front chamber between a diaphragm of the speaker and the one portion; and
arranging the front chamber and the plurality of openings to create a resonator having a resonance frequency within a frequency range of the alarm tone to selectively increase a sound pressure level of a given output that includes the alarm tone, the increase being at least 6 dB and within a frequency range of 2.5 kHz to 2.7 kHz, the given output includes a peak in frequency amplitude falling within the frequency range of 2.5 kHz to 2.7 kHz.
7. The method of claim 6 , wherein the speaker comprises an electrodynamic speaker.
8. The method of claim 6 , wherein the output of the speaker comprises a peak output of the device within the frequency range of the output of the speaker corresponding to the alarm tone.
9. The method of claim 6 , further comprising:
acoustically sealing the front chamber such that acoustic waves generated by the speaker are directed only through the plurality of openings.
10. A method comprising:
providing a speaker including a diaphragm, the speaker being capable of generating an output in the form of speech and an alarm tone within a frequency range of from 400 Hz to 4.0 kHz;
providing a housing for enclosing the speaker and including a plurality of openings within one portion of the housing;
positioning the speaker within the housing to define a front chamber between the diaphragm and the one portion, the speaker and the housing defining a device, and the front chamber including the plurality of openings within the one portion of the housing but is otherwise acoustically sealed; and
defining one or more parameters of the device to collectively create a resonator having a resonance frequency matching at least a portion of a frequency range of the output of the speaker corresponding to an alarm tone, the resonator selectively increasing a sound pressure level of a given output that includes the alarm tone, the increase being at least 6 dB and within a frequency range of 2.5 kHz to 2.7 kHz, the given output includes a peak in frequency amplitude falling within the frequency range of 2.5 kHz to 2.7 kHz.
11. The method of claim 10 , wherein the speaker comprises an electrodynamic speaker.
12. The method of claim 10 , wherein the one or more parameters comprise a volume of the front chamber, the method further comprising:
increasing the volume of the front chamber when the resonance frequency is to be decreased; and
decreasing the volume of the front chamber when the resonance frequency is to be increased.
13. The method of claim 10 , wherein the one or more parameters comprise a cross-sectional area of each of the openings, the method further comprising:
decreasing the cross-sectional area of the openings when the resonance frequency is to be decreased; and
increasing the cross-sectional area of the openings when the resonance frequency is to be increased.