The article considers mathematical and computer modeling of noise characteristics of strain-resistant pressure sensors. A model has been developed that takes into account thermal, shotgun, flicker, and process noise, which form the total output signal of the sensor. Based on a numerical experiment, spectral analysis by the Welch method was performed, the slope of the 1/𝑓 region was approximated, and the integrated noise powers in various frequency ranges were calculated. It is shown that flicker noise dominates in the low-frequency range, thermal noise dominates in the medium and high-frequency ranges, and drift noise components manifest themselves near the zero frequency. Analysis of the signal-to-noise ratio revealed its decrease at low frequencies and stabilization at frequencies above 1 kHz. The results obtained confirmed the adequacy of the model and its applicability for predicting noise characteristics, manufacturing quality, and optimizing the operating conditions of pressure sensors.

Keywords: tensoresistive sensors, noise characteristics, thermal noise, flicker noise, shot noise, power spectral density, signal-to-noise ratio, computer simulation