Evaluation of low cost microphone for active noise control in duct

Abstract

Economic feasibility and cost minimizing of experimental setups is one of the most important factors in many research and this is no different for active noise control (ANC) in ducts. Cheaper acquisition and assembly of equipment is desirable, provided you keep the same efficiency of acquisition, filtering, control and attenuation. This study aims to compare the performance of low cost microphones with precision microphones, when applied to the acoustic control system in feedforward configuration. This system makes use of a control board with Digital Signal Processor (DSP) in order to identify, analyze and compare systems of acoustic control in real time. To validate the performance of the sensors, an experimental bench was setup, which included a PVC duct and speakers as noise source and actuator. Microphones are the error and reference sensors. The system performance is obtained by a sound pressure meter acting on the outlet duct.

Measurement and sonification of construction site noise and particle pollution data

“…However, using cheap sound sensors might decrease the data quality, but as the price factor can be 100 to 1, a possible lower data quality can be justified as long as data quality is “good enough” for the purposes of its use (see e.g. discussions in Lima and Oliveira, 2016; Kivelä and Hakala, 2015; Vidanã-Vila et al. , 2020; Hallett et al.…”

“…However, using cheap sound sensors might decrease the data quality, but as the price factor can be 100 to 1, a possible lower data quality can be justified as long as data quality is "good enough" for the purposes of its use (see e.g. discussions in Lima and Oliveira, 2016;Kivel€ a and Hakala, 2015;Vidanã-Vila et al, 2020;Hallett et al, 2018). This reasoning can also be transferred to measuring particle concentration (Wang et al, 2015), and there are several studies that explore the use of low-cost particle sensors (Kelly et al, 2017;Bulot et al, 2020;Khan et al, 2021).…”