{'fraction_non_alphanumeric': 0.015181518151815182, 'fraction_numerical': 0.0039603960396039604, 'mean_word_length': 5.591304347826087, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Effects of a Synthetic Clarinet Bore Liner on Spectral Centroid and Fundamental Frequency Error

Throughout their relatively short history, various materials have been used to construct clarinets. While wood is the most common material used for modern professional clarinets, other materials have been and continue to be used, including synthetic materials. Despite the availability
 and accessibility of these materials, professional musicians rarely use instruments made from synthetics, insisting that their wooden counterparts produce superior results. Numerous studies have found the energy radiated directly by rigid cylindrical vibrating tubes to be both insignificant
 and have little to no effect on an internal vibrating air column. Using real instruments played by musicians, the present study compared a prototype clarinet upper joint with a synthetic bore liner produced by French instrument maker Henri Selmer Paris to two unlined, solid wood clarinets
 of the same make and model by examining two acoustical parameters. Spectral centroid and fundamental frequency f0 pitch error were measured for 45 notes (written E3-C7), performed by five accomplished clarinetists unaware of which instrument they were playing. Consistent
 with findings from other researchers, the particular instrument had no significant effect on spectral centroid. Meanwhile, although a significant effect of the instrument on f0 pitch error was found, pairwise comparisons suggest non-significant effects from the lined joint.