Laboratory system containing: - at least one laboratory device (252, 254, 406, 408, 412, 414, 416) designed for analysing and/or synthesizing a chemical substance, - at least one laboratory software module designed for processing data obtained from the at least one laboratory device; - a data processing device having supervisory software that provides an interface for using the at least one laboratory device and/or the at least one laboratory software module; and - a portable device having a microphone, wherein the device is interoperably connected to the supervisory software via a network, wherein the device is designed to interoperate with the supervisory software in order to allow a user to use the at least one laboratory device and/or the at least one laboratory software module in contact-free fashion by means of voice input into the microphone; characterized in that the supervisory software is configured to: - receive from the portable device a voice signal that the microphone has picked up on the basis of the voice input, wherein the voice signal contains general-language and technical-language words spoken by the user; - input the received voice signal into a voice-to-text conversion system, wherein the voice-to-text conversion system supports only the conversion of voice signals into a target vocabulary that does not contain the technical-language words; - receive from the voice-to-text conversion system a text that was generated from the voice signal by the voice-to-text conversion system; - generate a corrected text from the received text, wherein the corrected text is generated by the supervisory software alone or by the supervisory software by means of interpretation with text correction software to which the supervisory software is operatively connected, wherein the corrected text is generated by automatically replacing words and expressions from the target vocabulary in the received text with technical-language words in accordance with an association table of words in text form, wherein the association table associates at least one word from the target vocabulary with each of a multiplicity of technical-language words, wherein the at least one word from the target vocabulary that is associated with a technical-language word is a word or expression that the voice-to-text conversion system incorrectly identifies when this technical-language word is input in the form of a voice signal; and - use the corrected text to prompt the at least one laboratory device and/or the at least one laboratory software module to perform the analysis, synthesis and/or software function in accordance with statements in the corrected text. - at least one laboratory device (252, 254, 406, 408, 412, 414, 416) designed for analysing and/or synthesizing a chemical substance, - at least one laboratory software module designed for processing data obtained from the at least one laboratory device; - a data processing device having supervisory software that provides an interface for using the at least one laboratory device and/or the at least one laboratory software module; and - a portable device having a microphone, wherein the device is interoperably connected to the supervisory software via a network, wherein the device is designed to interoperate with the supervisory software in order to allow a user to use the at least one laboratory device and/or the at least one laboratory software module in contact-free fashion by means of voice input into the microphone; - receive from the portable device a voice signal that the microphone has picked up on the basis of the voice input, wherein the voice signal contains general-language and technical-language words spoken by the user; - input the received voice signal into a voice-to-text conversion system, wherein the voice-to-text conversion system supports only the conversion of voice signals into a target vocabulary that does not contain the technical-language words; - receive from the voice-to-text conversion system a text that was generated from the voice signal by the voice-to-text conversion system; - generate a corrected text from the received text, wherein the corrected text is generated by the supervisory software alone or by the supervisory software by means of interpretation with text correction software to which the supervisory software is operatively connected, wherein the corrected text is generated by automatically replacing words and expressions from the target vocabulary in the received text with technical-language words in accordance with an association table of words in text form, wherein the association table associates at least one word from the target vocabulary with each of a multiplicity of technical-language words, wherein the at least one word from the target vocabulary that is associated with a technical-language word is a word or expression that the voice-to-text conversion system incorrectly identifies when this technical-language word is input in the form of a voice signal; and - use the corrected text to prompt the at least one laboratory device and/or the at least one laboratory software module to perform the analysis, synthesis and/or software function in accordance with statements in the corrected text.