A detection device for a voice signal of a person, wherein the detection device includes a light source, a sensor device, an evaluation device, which comprises a conversion unit and an interpretation unit, as well as a first planar carrier medium, wherein the first planar carrier medium is formed as a light guide, at which a coupling-in area and a coupling-out area are provided, wherein the first planar carrier medium with the coupling-in area and the coupling-out area is formed as a transparent plate, foil or varnish, wherein - the light source is formed to emit pulsed light; - the coupling-in area is formed as a holographic element with a first deflection structure, which is configured to couple light, which is emitted from the light source and reflected on the person, into the first planar carrier medium; - the first planar carrier medium is formed to transfer the coupled-in reflected light from the coupling-in area to the coupling-out area by means of internal reflection; - the coupling-out area is formed as a holographic element with a second deflection structure, which is configured to couple the transferred reflected light, which is incident on the second deflection structure, out of the first planar carrier medium, wherein the coupling-in area and the coupling-out area comprise at least one holographic volume grating or holographic surface grating as the respective deflection structure (20, 22); - the sensor device is formed to detect the light coupled out in the coupling-out area and to provide it in the form of sensor data, which describes a travel time duration of the pulsed light emitted from the light source and reflected on the person; and - the evaluation device is formed to convert the sensor data into oscillation data by means of the conversion unit and to provide the voice signal of the person by means of the interpretation unit by evaluating the oscillation data by applying a voice interpretation criterion, wherein the voice interpretation criterion contains respective oscillation data, which is correlated with respective voice signal components, from which the voice signal of the person is composed, such that the interpretation unit is configured to evaluate the oscillation data by consulting the voice interpretation criterion such that the voice signal of the person can be provided, wherein the detection device includes an image detection device, which is formed to detect ambient light, which impinges from the environment onto the coupling-in area, is transferred to the coupling-out area by the first planar carrier medium and is coupled out at the coupling-out area, and to provide it in the form of image data, which correlates with the detected ambient light, to the evaluation device, wherein the evaluation device is configured to provide output data for the interpretation unit by applying a comparison criterion to the provided oscillation data and image data and to provide, by evaluation thereof by applying the voice interpretation criterion, the voice signal of the person. - the light source is formed to emit pulsed light; - the coupling-in area is formed as a holographic element with a first deflection structure, which is configured to couple light, which is emitted from the light source and reflected on the person, into the first planar carrier medium; - the first planar carrier medium is formed to transfer the coupled-in reflected light from the coupling-in area to the coupling-out area by means of internal reflection; - the coupling-out area is formed as a holographic element with a second deflection structure, which is configured to couple the transferred reflected light, which is incident on the second deflection structure, out of the first planar carrier medium, wherein the coupling-in area and the coupling-out area comprise at least one holographic volume grating or holographic surface grating as the respective deflection structure (20, 22); - the sensor device is formed to detect the light coupled out in the coupling-out area and to provide it in the form of sensor data, which describes a travel time duration of the pulsed light emitted from the light source and reflected on the person; and - the evaluation device is formed to convert the sensor data into oscillation data by means of the conversion unit and to provide the voice signal of the person by means of the interpretation unit by evaluating the oscillation data by applying a voice interpretation criterion, wherein the voice interpretation criterion contains respective oscillation data, which is correlated with respective voice signal components, from which the voice signal of the person is composed, such that the interpretation unit is configured to evaluate the oscillation data by consulting the voice interpretation criterion such that the voice signal of the person can be provided,