Journal of Advanced Transportation / 2020 / Article / Tab 1

Research Article

Forecasting Urban Rail Transit Vehicle Interior Noise and Its Applications in Railway Alignment Design

Table 1

Parameters about the smartphone and sensors.

DeviceItemParameter

SmartphoneModelFRD-AL00
Operating systemAndroid 8.0
ChipsetHiSilicon Kirin 950
CPUOcta-core (4 × 2.3 GHz and 4 × 1.8 GHz)
GPUMali-T880 MP4
Memory4 GB RAM

Inertial measurement unitModelLSM6DS3
Acceleration range±2/±4/±8/±16 g
Angular rate range±25/±250/±500 dps
Analog supply voltage1.71 V to 3.6 V
Power consumption1.25 mA

Microphone sensorsModelMP34DB02
Frequency range20 Hz to 20 kHz
Supply voltage range1.64 V to 3.6 V
Acoustic overload point120 dBSPL
Signal-to-noise ratio62.6 dB
Sensitivity−26 dBFS

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