Spherical speaker enclosure - Calculations for Bass-Reflex enclosure and Internal Helmholtz absorber
€12-18 EUR / hour
Cerrado
Publicado hace más de 7 años
€12-18 EUR / hour
Hi,
I'm looking for somebody to calculate the parameters for the design of a spherical speaker enclosure shape to be manufactured in high-tech concrete. We're using a 5" driver : Tang Band W5 2143 (complete specs below and spec sheet available for download).
- Calculate correct internal volume for Bass-reflex operation (Bessel alignment with FB of 45.7 Hz)
- Recommendation for placement and number of Bass-reflex ports to avoid port resonance the most possible.
- Calculate correct dimensions of a Internal Helmholtz absorber to lower the enclosures internal resonance.
- As a plus It might be interesting to to look into modelling the enclosure in COMSOL or other FEA application to be able to reduce resonances even further.
Thiele/Small parameters of W5 2143 driver below :
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Resonant Frequency (Fs)55 Hz
DC Resistance (Re)6.3 ohms
Voice Coil Inductance (Le)0.023 mH
Mechanical Q (Qms)3.21
Electromagnetic Q (Qes)0.43
Total Q (Qts)0.38
Compliance Equivalent Volume (Vas)0.671 ft.³
Mechanical Compliance of Suspension (Cms)1.398 mm/N
BL Product (BL)5.43 Tm
Diaphragm Mass Inc. Airload (Mms)5.99g
Maximum Linear Excursion (Xmax)2.5 mm
Surface Area of Cone (Sd)97.83 cm²
Hello,
I understood the initial scope of this project.
Although i want to discuss further this job in order to
prepare the final concept for this project.
After Complete discussion over the call or in chat, i
will prepare following things for you
- Technical Project Proposal
- Flow chart for this Project
- Execution plan (Step by step procedure with explanation how and at what that we are going to execute a particular task)