tag:blogger.com,1999:blog-11787852.post6107557707346144951..comments2007-05-11T16:22:26.830-07:00Avi Abramshttp://www.blogger.com/profile/12550929795356812957noreply@blogger.comBlogger11125tag:blogger.com,1999:blog-11787852.post-83582114774311488002007-05-11T16:22:00.000-07:002007-05-11T16:22:00.000-07:00The little girl is wearing one of the first machines used for permanent wave hairstyling. They were used back in the 1920's or 1930's. They were cumbersome and uncomfortable, and sometimes painful! No, I don't know this personally, just remember seeing one on a film of an old newsreel!mamafroghttp://www.blogger.com/profile/13215031912797290210noreply@blogger.comtag:blogger.com,1999:blog-11787852.post-51077749234037119002007-05-11T10:33:00.000-07:002007-05-11T10:33:00.000-07:00BTW, if you are wondering about the asymmetry of the acoustic receptors in 7, it might have been made to mimic Barn owls, which have no pinnas (external ear) but can still localize sounds in the vertical direction very well, thanks to asymmetric ears, one pointing up and the other down, http://www.wonderquest.com/owl-hearing.htm<BR/>shows an example about 1/3 of the way down.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-11787852.post-64911698741231974222007-05-11T08:46:00.000-07:002007-05-11T08:46:00.000-07:00#7 is a Aucostic Location Device. It was used to detect airplanes before radar. I saw one in England a few years back. You can also learn about it here: http://www.damninteresting.com/?p=486Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-11787852.post-72935930158220097862007-05-11T07:34:00.000-07:002007-05-11T07:34:00.000-07:00wow... thanks for the links... very interestingAvi Abramshttp://www.blogger.com/profile/12550929795356812957noreply@blogger.comtag:blogger.com,1999:blog-11787852.post-47275495422911758382007-05-11T07:29:00.000-07:002007-05-11T07:29:00.000-07:00Many examples of the kind of machines seen in #7 are found on <BR/>http://www.museumwaalsdorp.nl/en/airacous.htmlAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-11787852.post-66044153576659884192007-05-11T06:40:00.000-07:002007-05-11T06:40:00.000-07:00#7 is a machine built to locate armies by sound. It was common before the radarBenderhttp://www.benderblog.comnoreply@blogger.comtag:blogger.com,1999:blog-11787852.post-61726285301083896602007-05-11T04:37:00.000-07:002007-05-11T04:37:00.000-07:00I'm with Anonymous. In fact, here's a great article about the whole "anti-aircraft listening device" genre:<BR/><BR/>http://www.damninteresting.com/?p=486Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-11787852.post-29757981652282356082007-05-11T02:55:00.000-07:002007-05-11T02:55:00.000-07:00as an addition to my first commetn (aircraft detection) <BR/><BR/>http://www.dself.dsl.pipex.com/MUSEUM/COMMS/ear/ear.htmAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-11787852.post-24862206343430983772007-05-11T01:29:00.000-07:002007-05-11T01:29:00.000-07:00I'm with anonymous #2 on this one. It looks like the guy from picture nubmer 7 is standing on a beach, listening to the sound of the waves.Stijnhttp://aardling.com/noreply@blogger.comtag:blogger.com,1999:blog-11787852.post-70525983054982236512007-05-10T23:00:00.000-07:002007-05-10T23:00:00.000-07:00Number 7 is a hearing amplifier, it looks like.<BR/>i think its so that you can hear things far away, 1 for each earAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-11787852.post-77872454510515074062007-05-10T22:38:00.000-07:002007-05-10T22:38:00.000-07:00it is a pre-radar aircraft detection and localisation system .. using the sound of the aircraft engines and reflecting it into the listeners ears - the large distance between the artificial "ears" (parabolic sound mirrors) improves angular resolutin<BR/>onAnonymousnoreply@blogger.com