Beat encoding at mistuned octaves within single electrosensory neurons
Summary: Beats are slow periodic amplitude modulations resulting from the superposition of two spectrally close periodic signals. The difference frequency between the signals sets the frequency of the beat. A field study in the electric fish Apteronotus rostratus showed the behavioral relevance of v...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2023-07-01
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| Series: | iScience |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2589004223009173 |
| _version_ | 1797774557656907776 |
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| author | Alexandra Barayeu Ramona Schäfer Jan Grewe Jan Benda |
| author_facet | Alexandra Barayeu Ramona Schäfer Jan Grewe Jan Benda |
| author_sort | Alexandra Barayeu |
| collection | DOAJ |
| description | Summary: Beats are slow periodic amplitude modulations resulting from the superposition of two spectrally close periodic signals. The difference frequency between the signals sets the frequency of the beat. A field study in the electric fish Apteronotus rostratus showed the behavioral relevance of very high difference frequencies. Contrary to expectations from previous studies, our electrophysiological data show strong responses of p-type electroreceptor afferents whenever the difference frequency approaches integer multiples (mistuned octaves) of the fish’s own electric field frequency (carrier). Mathematical reasoning and simulations show that common approaches to extract amplitude modulations, such as Hilbert transform or half-wave rectification, are not sufficient to explain the responses at carrier octaves. Instead, half-wave rectification needs to be smoothed out, for example by a cubic function. Because electroreceptive afferents share many properties with auditory nerve fibers, these mechanisms may underly the human perception of beats at mistuned octaves as described by Ohm and Helmholtz. |
| first_indexed | 2024-03-12T22:22:47Z |
| format | Article |
| id | doaj.art-895c22baf4f74ad88ac4357d0ec93add |
| institution | Directory Open Access Journal |
| issn | 2589-0042 |
| language | English |
| last_indexed | 2024-03-12T22:22:47Z |
| publishDate | 2023-07-01 |
| publisher | Elsevier |
| record_format | Article |
| series | iScience |
| spelling | doaj.art-895c22baf4f74ad88ac4357d0ec93add2023-07-23T04:54:58ZengElsevieriScience2589-00422023-07-01267106840Beat encoding at mistuned octaves within single electrosensory neuronsAlexandra Barayeu0Ramona Schäfer1Jan Grewe2Jan Benda3Neuroethology, Institute for Neurobiology, Eberhard Karls University, 72076 Tübingen, GermanyNeuroethology, Institute for Neurobiology, Eberhard Karls University, 72076 Tübingen, GermanyNeuroethology, Institute for Neurobiology, Eberhard Karls University, 72076 Tübingen, GermanyNeuroethology, Institute for Neurobiology, Eberhard Karls University, 72076 Tübingen, Germany; Bernstein Center for Computational Neuroscience Tübingen, 72076 Tübingen, Germany; Werner Reichardt Centre for Integrative Neuroscience, 72076 Tübingen, Germany; Corresponding authorSummary: Beats are slow periodic amplitude modulations resulting from the superposition of two spectrally close periodic signals. The difference frequency between the signals sets the frequency of the beat. A field study in the electric fish Apteronotus rostratus showed the behavioral relevance of very high difference frequencies. Contrary to expectations from previous studies, our electrophysiological data show strong responses of p-type electroreceptor afferents whenever the difference frequency approaches integer multiples (mistuned octaves) of the fish’s own electric field frequency (carrier). Mathematical reasoning and simulations show that common approaches to extract amplitude modulations, such as Hilbert transform or half-wave rectification, are not sufficient to explain the responses at carrier octaves. Instead, half-wave rectification needs to be smoothed out, for example by a cubic function. Because electroreceptive afferents share many properties with auditory nerve fibers, these mechanisms may underly the human perception of beats at mistuned octaves as described by Ohm and Helmholtz.http://www.sciencedirect.com/science/article/pii/S2589004223009173Behavioral neuroscienceAnimal scienceModeling signal processing system |
| spellingShingle | Alexandra Barayeu Ramona Schäfer Jan Grewe Jan Benda Beat encoding at mistuned octaves within single electrosensory neurons iScience Behavioral neuroscience Animal science Modeling signal processing system |
| title | Beat encoding at mistuned octaves within single electrosensory neurons |
| title_full | Beat encoding at mistuned octaves within single electrosensory neurons |
| title_fullStr | Beat encoding at mistuned octaves within single electrosensory neurons |
| title_full_unstemmed | Beat encoding at mistuned octaves within single electrosensory neurons |
| title_short | Beat encoding at mistuned octaves within single electrosensory neurons |
| title_sort | beat encoding at mistuned octaves within single electrosensory neurons |
| topic | Behavioral neuroscience Animal science Modeling signal processing system |
| url | http://www.sciencedirect.com/science/article/pii/S2589004223009173 |
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