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| sound_beehive [2014/12/10 17:05] – [AUDIO TOOLBOX] ami | sound_beehive [2016/01/13 17:48] (current) – external edit 127.0.0.1 |
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| [[audio toolbox notes]] | [[audio toolbox notes]] |
| | {{:sound_beehive:audiotoolbox:sound_communication_in_honeybees_beesource_beekeeping.pdf|sound_communication_in_honeybees}} |
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| [[video toolbox notes]] | [[video toolbox notes]] |
| | {{:sound_beehive:videotoolbox:video-monitoring-bees.pdf|Video Monitoring of Honey Bee Colonies at the Hive Entrance}} |
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| Vibrations as communication tool: Years after von Frisch interpreted the symbolism of the dances, Wenner and Esch independently found that dancing bees make sounds during their waggling run. Both men suggested that the sounds might help the dancer attract an audience in the dark nest. Many researchersdoubted this premise becausethey thought bees could not hear airborne sounds. Still, the notion was not ignored altogether. Many insects, including bees, are quite sensitive to vibrations. Hence, some investigators speculated that the sounds the foragers produced could vibrate the combs under their feet as they danced. The comb vibrations might then advertise the dance to those bees who could not otherwise see the forager. | Vibrations as communication tool: Years after von Frisch interpreted the symbolism of the dances, Wenner and Esch independently found that dancing bees make sounds during their waggling run. Both men suggested that the sounds might help the dancer attract an audience in the dark nest. Many researchersdoubted this premise becausethey thought bees could not hear airborne sounds. Still, the notion was not ignored altogether. Many insects, including bees, are quite sensitive to vibrations. Hence, some investigators speculated that the sounds the foragers produced could vibrate the combs under their feet as they danced. The comb vibrations might then advertise the dance to those bees who could not otherwise see the forager. |
| One of us (Kirchner), together with Axel Michelsen of Odense University in Denmark, answered part of this question several years ago. In their experiments, Michelsen and Kirchner aimed a laser beam at the comb near a dancing bee to determine whether or not the dance sounds generated vibrations in the comb. Surface vibrations, if any occurred, would cause minute changes in the light refiected from the comb. In this way, it was possible to measure the vibrations without touching the comb and possibly triggering additional tremors. These measurements revealed that dancing bees do not rattle the comb but that their audience does. The dance attenderssometimes emit a short squeak by pressing their thoraxes against the comb. This action vibrates the comb enough so that the dancing bee stops her movements. She then doles out small samples of the food she has collected so that her audience knows not only the direction and distance to the feeding site but how the food smells and tastes as well. [[http://www.beekeeping.com/articles/us/bee_dance_2.htm| vibration, communication and bee dances]]. | One of us (Kirchner), together with Axel Michelsen of Odense University in Denmark, answered part of this question several years ago. In their experiments, Michelsen and Kirchner aimed a laser beam at the comb near a dancing bee to determine whether or not the dance sounds generated vibrations in the comb. Surface vibrations, if any occurred, would cause minute changes in the light refiected from the comb. In this way, it was possible to measure the vibrations without touching the comb and possibly triggering additional tremors. These measurements revealed that dancing bees do not rattle the comb but that their audience does. The dance attenderssometimes emit a short squeak by pressing their thoraxes against the comb. This action vibrates the comb enough so that the dancing bee stops her movements. She then doles out small samples of the food she has collected so that her audience knows not only the direction and distance to the feeding site but how the food smells and tastes as well. [[http://www.beekeeping.com/articles/us/bee_dance_2.htm| vibration, communication and bee dances]]. |
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| | {{:sound_beehive:geluidstrillingen-bijenraat.pdf|De bijenraat als communicatienet}} |
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| [[sensor toolbox]] | [[sensor toolbox]] |
| {{:sound_beehive:streaming-bees.png?400x300|}} | {{:sound_beehive:streaming-bees.png?400x300|}} |
| //Streaming the bees on 10th of december 2014, a sunny afternoon. The hive is packed in an extra pink layer, for winter.// | //Streaming the bees on 10th of december 2014, a sunny afternoon. The hive is packed in an extra pink layer, for winter.// |
| =====BIO-ACOUSTIC SOUND ANALYSIS===== | }=====BIO-ACOUSTIC SOUND ANALYSIS===== |
| {{gallery>:sound_beehive:bioacoustics }} | {{gallery>:sound_beehive:bioacoustics }} |
| //Spectrogram and timeslice analysis of a 4 channel.wav soundfile (of 4 piezo microphones placed into the broodbox of the sound beehive), **11 june 2014 at 12:00**. The piezo contact microphones are still virgin, no wax is deposited by the bees. | //Spectrogram and timeslice analysis of a 4 channel.wav soundfile (of 4 piezo microphones placed into the broodbox of the sound beehive), **11 june 2014 at 12:00**. The piezo contact microphones are still virgin, no wax is deposited by the bees. |
| {{:sound_beehive:presentation:transbh_redbees.jpg?300x450|}}{{:sound_beehive:presentation:transbh_blackbees.jpg?300x450|}} {{url>http://pandora.okno.be/MT/editor/00:01:04,00:00:00,00:03:00#?embed=true 300px,173px noborder}} | {{:sound_beehive:presentation:transbh_redbees.jpg?300x450|}}{{:sound_beehive:presentation:transbh_blackbees.jpg?300x450|}} {{url>http://pandora.okno.be/MT/editor/00:01:04,00:00:00,00:03:00#?embed=true 300px,173px noborder}} |
| //SBH-presentation front and rear --- flock of bees on a frame [video]// | //SBH-presentation front and rear --- flock of bees on a frame [video]// |
| {{:sound_beehive:presentation:render01.jpg?277x300|}} {{:sound_beehive:transp-hive_transp.jpg?500x360|}} | {{:sound_beehive:sensordata-kortrijk.jpg?300x400|sensordata box}} |
| //plexi show-case for presentation of research material// | //sensordata, display in box - temperature, humidity, light// |
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