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An instrument used to magnify sound
A microphone.
magnafing glass
The dictograph is a tool to magnify sound. It is often used by detectives.
a microscope mostly used for to investigate stars and planets in the outer space
A magnify glass
A frequency meter is the instrument that is used to measure the amplitude of sound. It reads the energy from a sound wave.
An amplifier
well it can be used for... ultra sound scans, listening to the radio, or playing an instrument!!
a microscope
The optical microscope uses a magnetic field to magnify images up to 1,000.000
telescope-is a instrument designed to gather and magnify energy of objects in space so the energy is study spectroscope-a instrument used to seprate light into very fine bands