Observation of non-reciprocal harmonic conversion in real sounds
Abstract Reciprocity guarantees that in most media, sound transmission is symmetric between two points of space when the location of the source and receiver are interchanged. This fundamental law can be broken in non-linear media, often at the cost of detrimental input power levels, large insertion...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2023-05-01
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| Series: | Communications Physics |
| Online Access: | https://doi.org/10.1038/s42005-023-01217-w |
| _version_ | 1797832057118785536 |
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| author | Xinxin Guo Hervé Lissek Romain Fleury |
| author_facet | Xinxin Guo Hervé Lissek Romain Fleury |
| author_sort | Xinxin Guo |
| collection | DOAJ |
| description | Abstract Reciprocity guarantees that in most media, sound transmission is symmetric between two points of space when the location of the source and receiver are interchanged. This fundamental law can be broken in non-linear media, often at the cost of detrimental input power levels, large insertion losses, and ideally prepared single-frequency input signals. Thus, previous observations of non-reciprocal sound transmission have focused on pure tones, and cannot handle real sounds composed of various harmonics of a low-frequency fundamental note, as generated for example by musical instruments. Here, we extend the reach of non-reciprocal acoustics by achieving large, tunable, and timbre-preserved non-reciprocal transmission of sound notes composed of several harmonics, originating from musical instruments. This is achieved in a non-linear, actively reconfigurable, and non-Hermitian isolator that can handle arbitrarily low input power at any audible frequency, while providing isolation levels up to 30dB and a tunable level of non-reciprocal gain. Our findings may find applications in sound isolation, noise control, non-reciprocal and non-Hermitian metamaterials, and analog audio processing. |
| first_indexed | 2024-04-09T14:02:44Z |
| format | Article |
| id | doaj.art-e6a6bfee1d16477db8ea32035fdbcc9d |
| institution | Directory Open Access Journal |
| issn | 2399-3650 |
| language | English |
| last_indexed | 2024-04-09T14:02:44Z |
| publishDate | 2023-05-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Communications Physics |
| spelling | doaj.art-e6a6bfee1d16477db8ea32035fdbcc9d2023-05-07T11:15:16ZengNature PortfolioCommunications Physics2399-36502023-05-01611610.1038/s42005-023-01217-wObservation of non-reciprocal harmonic conversion in real soundsXinxin Guo0Hervé Lissek1Romain Fleury2Signal Processing Laboratory LTS2, Ecole Polytechnique Fédérale de LausanneSignal Processing Laboratory LTS2, Ecole Polytechnique Fédérale de LausanneLaboratory of Wave Engineering, Ecole Polytechnique Fédérale de LausanneAbstract Reciprocity guarantees that in most media, sound transmission is symmetric between two points of space when the location of the source and receiver are interchanged. This fundamental law can be broken in non-linear media, often at the cost of detrimental input power levels, large insertion losses, and ideally prepared single-frequency input signals. Thus, previous observations of non-reciprocal sound transmission have focused on pure tones, and cannot handle real sounds composed of various harmonics of a low-frequency fundamental note, as generated for example by musical instruments. Here, we extend the reach of non-reciprocal acoustics by achieving large, tunable, and timbre-preserved non-reciprocal transmission of sound notes composed of several harmonics, originating from musical instruments. This is achieved in a non-linear, actively reconfigurable, and non-Hermitian isolator that can handle arbitrarily low input power at any audible frequency, while providing isolation levels up to 30dB and a tunable level of non-reciprocal gain. Our findings may find applications in sound isolation, noise control, non-reciprocal and non-Hermitian metamaterials, and analog audio processing.https://doi.org/10.1038/s42005-023-01217-w |
| spellingShingle | Xinxin Guo Hervé Lissek Romain Fleury Observation of non-reciprocal harmonic conversion in real sounds Communications Physics |
| title | Observation of non-reciprocal harmonic conversion in real sounds |
| title_full | Observation of non-reciprocal harmonic conversion in real sounds |
| title_fullStr | Observation of non-reciprocal harmonic conversion in real sounds |
| title_full_unstemmed | Observation of non-reciprocal harmonic conversion in real sounds |
| title_short | Observation of non-reciprocal harmonic conversion in real sounds |
| title_sort | observation of non reciprocal harmonic conversion in real sounds |
| url | https://doi.org/10.1038/s42005-023-01217-w |
| work_keys_str_mv | AT xinxinguo observationofnonreciprocalharmonicconversioninrealsounds AT hervelissek observationofnonreciprocalharmonicconversioninrealsounds AT romainfleury observationofnonreciprocalharmonicconversioninrealsounds |