Supplementary material S29: Accelerometer sensitivity and linearity at varying signal magnitudes.

<p>Accelerometer sensitivity and linearity with frequency. Artificial vibrations with three different magnitudes were driven with a frequency sweep from 0 to 24 kHz, with an electromagnetic shaker. The accelerometer outputs (a) are modulated by both the shaker and the crystal responses. The ratio of any two curves (signal = 6 divided by signal = 3 for (b), and signal = 9 divided by signal = 3 for (c)) allows the estimation of the accelerometer&rsquo;s linearity alone. These figures demonstrate the remarkable linearity of our sensor, except for the bandwidth between 14-18 kHz and frequencies beyond 23 kHz, where up to 10% deviation can be seen. Our signals of interest seldom or never overlap with these frequency bands.</p>