منابع مشابه
Virtual Pitch and Pitch Shifts in Church Bells
It is well established that musical sounds comprising multiple partials with frequencies approximately in the ratio of small integers give rise to a strong sensation of pitch even if the lowest or fundamental partial is missing—the so-called virtual pitch effect. Experiments on thirty test subjects demonstrate that this virtual pitch is shifted significantly by changes in the spacing of the con...
متن کاملPartial Frequencies and Chladni’s Law in Church Bells
The rim partials of a church bell (those with an antinode at the soundbow) generate the strike pitch or perceived note of the bell. The spacing in frequency of the higher rim partials has an important effect on the tonal quality of the bell. Investigations into the partial frequencies of 2752 bells, both bronze and steel, of a wide variety of dates, founders and sizes, show a simple and unexpec...
متن کاملAn Investigation of the Baker Bells
The Baker Bells have been a Dartmouth fixture since 1928 when they first rang from the top of Baker Library. They mark the passage of time, ringing on the hour and half-hour. At 6pm every day, the sounds of the “Alma Mater” fill the campus. The bells can also be programmed to play everything from “Happy Birthday” to the Beatles. For our project, we decided to apply what we learned in class to i...
متن کاملBells, Motels and Permutation Groups
This article is about the mathematics of ringing the changes. We describe the mathematics which arises from a real-world activity, that of ringing the changes on bells. We present Rankin’s solution of one of the famous old problems in the subject.
متن کاملNew alarm bells
Some species do appear to practise construction skills — birds in particular — and to require some mental flexibility in starting the process. But ultimately, animals build the way they do because they are genetically programmed to do so, Hansell concludes. But evolution can lead to surprising results. Hansell notes that most of our closest primate relatives create little more than temporary sh...
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ژورنال
عنوان ژورنال: Archaeological Journal
سال: 1882
ISSN: 0066-5983,2373-2288
DOI: 10.1080/00665983.1882.10852024