IPA: //ˈdʒiːəˌfoʊn//
KK: /ˈdʒiːəˌfoʊn/
A device that detects and records vibrations in the ground, often used in geological studies and exploration.
The geophone was placed in the field to monitor seismic activity during the earthquake.
Geophone → It is formed from "geo-" (from Greek "gē", meaning earth) and "phone" (from Greek "phōnē", meaning sound or voice). The word "geophone" refers to a device that detects sound waves in the earth.
Think of 'geo' meaning 'earth' and 'phone' meaning 'sound' — a geophone is a device that listens to sounds coming from the earth.