I believe that the machine is called a seismograph.
it is a cat-scan machine
Seismographer
The Seismograph is used to measure the Magnitude of an earthquake.
Used to measure earthquake activity with sound waves.
PAGASA used richter scale to measure the intensity of an earthquake
A seismometer (replacing the outdated term seismograph), but other instruments may also respond to an earthquake. The simplest example of a seismograph is a pendulum.
seismograph is generally used to measure earthquakes.
what machine can be used to measure sound waves
Earthquake measure
The Richter magnitude scale is used to measure the strength of an earthquake.
There are several instruments that are used to monitor earthquake activity. Some of the instruments include magnetometers, creep meters, strain meters and tilt meters among others.
richter scale