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| university:courses:alm1k:circuits1:alm-cir-11 [27 Jan 2021 22:36] – use wp> interwiki links Robin Getz | university:courses:alm1k:circuits1:alm-cir-11 [05 Apr 2023 18:33] – [Loudspeaker Impedance Model] Doug Mercer |
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| ======Activity: Measuring a Loudspeaker Impedance Profile====== | ======Activity: Measuring a Loudspeaker Impedance Profile, For ADALM1000====== |
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| =====Objective:===== | =====Objective:===== |
| • F<sub>S</sub> is the resonant frequency of a loudspeaker. The impedance of a loudspeaker is a maximum at F<sub>S</sub>. The resonant frequency is the point at which the total mass of the moving parts of the loudspeaker become balanced with the force of the speaker suspension when in motion. The resonant frequency information is important to prevent an enclosure from ringing. In general, the mass of the moving parts and the stiffness of the speaker suspension are the key elements that affect the resonant frequency. A vented enclosure (bass reflex) is tuned to F<sub>S</sub> so that the two work in unison. As a rule, a speaker with a lower F<sub>S</sub> is better for low-frequency reproduction than a speaker with a higher F<sub>S</sub>. | • F<sub>S</sub> is the resonant frequency of a loudspeaker. The impedance of a loudspeaker is a maximum at F<sub>S</sub>. The resonant frequency is the point at which the total mass of the moving parts of the loudspeaker become balanced with the force of the speaker suspension when in motion. The resonant frequency information is important to prevent an enclosure from ringing. In general, the mass of the moving parts and the stiffness of the speaker suspension are the key elements that affect the resonant frequency. A vented enclosure (bass reflex) is tuned to F<sub>S</sub> so that the two work in unison. As a rule, a speaker with a lower F<sub>S</sub> is better for low-frequency reproduction than a speaker with a higher F<sub>S</sub>. |
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| • R represents the mechanical resistance of a driver's suspension losses. | • R represents the mechanical resistance of a driver's suspension losses. Part of the “mechanical resistance” in the system is the resistance of the cone to moving through the air, which happens to be the mechanical process that produces the pressure variations that we perceive as ‘sound’. |
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| ====Materials:==== | ====Materials:==== |
