In refraction seismology, what are the devices called that function as listening ears?

In refraction seismology, what are the devices called that function as listening ears?

• A. Geophones (jugs)
• B. Seismographs
• C. Hydrophones
• D. Microphones

Answer: (A)

Geophones are the listening ears in refraction seismology. They are contact sensors placed on the ground that detect seismic vibrations as waves pass through the subsurface and convert that ground motion into an electrical signal for recording. This sensing role is why they’re described as listening ears for the survey; field crews often refer to them as geophones (sometimes called geophone jugs). Seismographs are the recording systems that capture and store the signals, while hydrophones detect underwater sound and microphones detect airborne sound, neither of which fit the ground-based sensing used here.

Geophones are the listening ears in refraction seismology. They are contact sensors placed on the ground that detect seismic vibrations as waves pass through the subsurface and convert that ground motion into an electrical signal for recording. This sensing role is why they’re described as listening ears for the survey; field crews often refer to them as geophones (sometimes called geophone jugs). Seismographs are the recording systems that capture and store the signals, while hydrophones detect underwater sound and microphones detect airborne sound, neither of which fit the ground-based sensing used here.