Measuring a speakers‘ frequency response using the interferometric sensor
Only recently, attocube released the new FPS3010, which is even more integrated and automated as previous versions. Here, the FPS3010 was used to measure the displacement of a speakers’ membrane to characterize its frequency response. The setup is shown in Figure 2.
The new FPS3010 has outstanding properties such as a measurement bandwidth of 10 MHz. At the same time, the alignment restrictions for the optical sensor are relaxed, due to a large acceptance angle of ±0.4°. This makes the FPS3010 usable in a wide range of applications. The standard version is equipped with three sensor channels for the detection of e.g. linear movement together with pitch and yaw or 3D motion.
This measurement was realized with the Displacement Measuring Interferometer.