New Generations of Infrasound Sensors: Technological Developments and Calibration

Nief, G.; Talmadge, Carrick L.; Rothman, Jeff; Gabrielson, Thomas B.

doi:10.1007/978-3-319-75140-5_2

Cited by 10 publications

(4 citation statements)

References 6 publications

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“…Given the high number of active sources, infrasound is usually recorded using arrays of speci c sensors, from a range of different types of absolute to differential pressure devices (e.g., Ponceau and Bosca, 2010;Nief et al, 2019), rather than single ones. An array allows to improve the signal-to-noise ratio, to discriminate coherent signal from noise, as well as a more accurate estimate of the wave parameters (e.g., Scott et al, 2007;Christie and Campus, 2010;Johnson, 2019).…”

Section: Infrasoundmentioning

confidence: 99%

The use of a low-cost, small-aperture array as an auxiliary tool to improve infrasound monitoring in the Azores region

Jesus,

Belli,

Gheri

et al. 2023

Preprint

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The 2022’s seismo-volcanic crisis on São Jorge Island of the Azores archipelago, has provided an opportunity to deploy a portable infrasound array (SJ1), in a collaborative work between the Research Institute for Volcanology and Risk Assessment (IVAR), of the University of the Azores (UAc), and the University of Florence (UniFI). This 4-element array became operational on 2nd April 2022. Despite being deployed in a first stage to monitor the activities related to the volcanic unrest on São Jorge Island, SJ1 integrated an infrasound monitoring network in the region in association with the IMS infrasound station IS42, located on Graciosa Island at ~ 40 km distance. This work emphasises the importance of low-cost portable infrasound arrays in improving the coverage of infrasound observations for local and regional monitoring purposes in the area of the Azores. In this regard, two events recorded by both arrays are briefly exemplified herein: a low-magnitude earthquake on São Jorge Island and a fireball which crossed the North Atlantic Ocean.

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Section: Infrasoundmentioning

confidence: 99%

The use of a low-cost, small-aperture array as an auxiliary tool to improve infrasound monitoring in the Azores region

Jesus,

Belli,

Gheri

et al. 2023

Preprint

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“…Various studies show sensor self-noise and sensitivity curves of infrasound sensors (Ponceau and Bosca, 2010;Merchant, 2015;Slad and Merchant, 2016;Marty, 2019;Nief et al, 2019). The IMS specifications state that the sensor self-noise should be at least 18 dB below the global low-noise curves at 1 Hz (Brown et al, 2014), generated from global infrasound measurements using the IMS.…”

Section: Infrasound Sensormentioning

confidence: 99%

“…Current state-of-the-art data loggers have a 24-bit resolution. New infrasound sensor techniques involve digital outputs since the ADC conversion is realized inside the sensor (Nief et al, 2017(Nief et al, , 2019.…”

Section: Infrasound Sensormentioning

confidence: 99%

The INFRA-EAR: a low-cost mobile multidisciplinary measurement platform for monitoring geophysical parameters

et al. 2021

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Abstract. Geophysical studies and real-time monitoring of natural hazards, such as volcanic eruptions or severe weather events, benefit from the joint analysis of multiple geophysical parameters. However, typical geophysical measurement platforms still provide logging solutions for a single parameter, due to different community standards and the higher cost per added sensor. In this work, the Infrasound and Environmental Atmospheric data Recorder (INFRA-EAR) is presented, which has been designed as a low-cost mobile multidisciplinary measurement platform for geophysical monitoring. In particular, the platform monitors infrasound but concurrently measures barometric pressure, accelerations, and wind flow and uses the Global Positioning System (GPS) to position the platform. Due to its digital design, the sensor platform can be readily integrated with existing geophysical data infrastructures and be embedded in geophysical data analysis. The small dimensions and low cost per unit allow for unconventional, experimental designs, for example, high-density spatial sampling or deployment on moving measurement platforms. Moreover, such deployments can complement existing high-fidelity geophysical sensor networks. The platform is designed using digital micro-electromechanical system (MEMS) sensors embedded on a printed circuit board (PCB). The MEMS sensors on the PCB are a GPS, a three-component accelerometer, a barometric pressure sensor, an anemometer, and a differential pressure sensor. A programmable microcontroller unit controls the sampling frequency of the sensors and data storage. A waterproof casing is used to protect the mobile platform against the weather. The casing is created with a stereolithography (SLA) Formlabs 3D printer using durable resin. Thanks to low power consumption (9 Wh over 25 d), the system can be powered by a battery or solar panel. Besides the description of the platform design, we discuss the calibration and performance of the individual sensors.

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“…Various studies show that the sensitivity curves of infrasound sensors [Ponceau and Bosca, 2010] [Merchant, 2015] [ Slad and Merchant, 2016] [Marty, 2019] [Nief et al, 2019] lie below the global low ambient noise curves [Brown et al, 2014], which have been generated from global infrasound measurements using the IMS. Typical infrasound sensor networks, such as the IMS, make use of analog sensors that are connected to a separate data logger to convert the measured voltage differences to a digital signal.…”

Section: Infrasound Sensormentioning

confidence: 99%

A low-cost mobile multidisciplinary measurement platform for monitoring geophysical parameters

Ouden

Assink

Oudshoorn

et al. 2020

Preprint

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Abstract. Geophysical studies and real-time monitoring of natural hazards, such as volcanic eruptions or severe weather events, benefit from the joint analysis of multiple geophysical parameters. However, typical geophysical measurement platforms still provide logging solutions for a single parameter, due to different community standards and the higher cost rate per added sensor. In this work, the infrasound-logger is presented, which has been designed as a low-cost mobile multidisciplinary measurement platform for geophysical monitoring. The platform monitors in particular infrasound, but concurrently measures barometric pressure, accelerations, wind flow and uses the Global Positioning System (GPS) for positioning of the platform. Due to its digital design, the sensor platform can readily be integrated with existing geophysical data infrastructures and be embedded in the analysis of geophysical data. The small dimensions and lower cost price per unit allow for unconventional experimental designs, for example high density spatial sampling or deployment on moving measurement platforms. Moreover, such deployments can complement existing high-fidelity geophysical sensor networks. The platform is designed using digital Micro-electromechanical Systems (MEMS) sensors that are embedded on a Printed Circuit Board (PCB). The MEMS sensors on the PCB are: a GPS, a three-component accelerometer, a barometric pressure sensor, an anemometer and a differential pressure sensor. A programmable microcontroller unit controls the sampling frequency of the sensors, and the data storage. A waterproof casing is used to protect the mobile platform against the weather. The casing is created with a stereolithography (SLA) Formlabs 3D printer, using durable resin. Thanks to a low power consumption (9 Wh over 25 days), the system can be powered by a battery or solar panel. Besides the description of the platform design, we discuss the calibration and performance of the individual sensors.

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New Generations of Infrasound Sensors: Technological Developments and Calibration

Cited by 10 publications

References 6 publications

The use of a low-cost, small-aperture array as an auxiliary tool to improve infrasound monitoring in the Azores region

The use of a low-cost, small-aperture array as an auxiliary tool to improve infrasound monitoring in the Azores region

The INFRA-EAR: a low-cost mobile multidisciplinary measurement platform for monitoring geophysical parameters

A low-cost mobile multidisciplinary measurement platform for monitoring geophysical parameters

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