An apparatus for measuring a property of an object with acoustically induced electromagnetic waves, comprising: an anechoic chamber; a retainer table for holding said measurable object disposed in said anechoic chamber; an acoustic generator for emitting an acoustic wave towards said measurable object; an antenna or coil for receiving electromagnetic waves generated from a part of said measurable object which is irradiated with said acoustic wave emitted by said acoustic generator; and a control, measure, and process unit (29, 30, 50, 52,60, 65, 75, 76) for driving and controlling said acoustic generator and for measuring and processing said electromagnetic waves received by said antenna or coil, wherein the control, measure and process unit is configured to: measure a magnetic property from one or more characteristics selected from the group which consists of intensity, phase, and frequency characteristics of said electromagnetic waves, characterized in that it is further configured to determine information on nuclear or electron spin in the object by determining a resonance frequency at which the strength or phase of electromagnetic waves largely varies and by scanning frequencies of sound waves to obtain a spectrum, and scan the focusing position of acoustic waves over a two-dimensional surface or three-dimensional volume of said measurable object or mechanically scan said acoustic generator around said measurable object to scan the focusing position of acoustic waves over a two-dimensional surface or three-dimensional volume of said measurable object. an anechoic chamber; a retainer table for holding said measurable object disposed in said anechoic chamber; an acoustic generator for emitting an acoustic wave towards said measurable object; an antenna or coil for receiving electromagnetic waves generated from a part of said measurable object which is irradiated with said acoustic wave emitted by said acoustic generator; and a control, measure, and process unit (29, 30, 50, 52,60, 65, 75, 76) for driving and controlling said acoustic generator and for measuring and processing said electromagnetic waves received by said antenna or coil, wherein the control, measure and process unit is configured to: measure a magnetic property from one or more characteristics selected from the group which consists of intensity, phase, and frequency characteristics of said electromagnetic waves, characterized in that it is further configured to determine information on nuclear or electron spin in the object by determining a resonance frequency at which the strength or phase of electromagnetic waves largely varies and by scanning frequencies of sound waves to obtain a spectrum, and scan the focusing position of acoustic waves over a two-dimensional surface or three-dimensional volume of said measurable object or mechanically scan said acoustic generator around said measurable object to scan the focusing position of acoustic waves over a two-dimensional surface or three-dimensional volume of said measurable object. measure a magnetic property from one or more characteristics selected from the group which consists of intensity, phase, and frequency characteristics of said electromagnetic waves, characterized in that it is further configured to determine information on nuclear or electron spin in the object by determining a resonance frequency at which the strength or phase of electromagnetic waves largely varies and by scanning frequencies of sound waves to obtain a spectrum, and scan the focusing position of acoustic waves over a two-dimensional surface or three-dimensional volume of said measurable object or mechanically scan said acoustic generator around said measurable object to scan the focusing position of acoustic waves over a two-dimensional surface or three-dimensional volume of said measurable object.