TY - CHAP A1 - Schmidt, Henriette A1 - Schmidt, Markus A1 - Schweiger, Julienne M.-I. A1 - Lenz, Claudia A1 - Hartmann, Holger A1 - Pflugmacher, Candy A1 - Götz, Bernhard A1 - Gebauer, Gerhard A1 - Schill, Harald T1 - Climate sensitivity of rare native tree species in NE-Germany - A dendroecological and ecophysiological approach Y1 - 2018 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:eb1-opus-7610 N1 - Session 14: Forest Ecology - linking diversity and function, Poster 7; 48th annual meeting of the Ecological Society of Germany Austria and Switzerland (GfÖ), September 10-14, 2018, Vienna, Austria ER - TY - CHAP A1 - Schmidt, Markus A1 - Hartmann, Holger A1 - Pflugmacher, Candy A1 - Schmidt, Henriette A1 - Schweiger, Julienne A1 - Lenz, Claudia A1 - Götz, Bernhard A1 - Schill, Harald T1 - Klimasensitivität seltener heimischer Baumarten im nordostdeutschen Tiefland - Ökophysiologische Untersuchungen zur Reaktion auf Trockenstress T2 - Forstwissenschaftliche Tagung (FowiTa), 24.-27. September 2018, Göttingen, Germany KW - Klimawandel; Trockenheit; heimische Baumarten; Photosyntheserate; isohydrisch; anisohydrisch Y1 - 2018 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:eb1-opus-4294 N1 - Session 1: Seltene heimische und nicht-heimische Baumarten im Klimawandel: Anbauempfehlungen, Chancen und Risiken, Poster 1-P09 ER - TY - CHAP A1 - Munk, Christoph A1 - Clauder, Lothar A1 - Pfriem, Alexander T1 - Acoustical comparison of two different guitars, made of untreated tropical wood and thermally modified wood, using a frequency response analysis T2 - Northern European Network for Wood Science & Engineering (WSE) N2 - To this day, many guitar makers around the world use primarily tropical woods such as rosewood (Dalbergia spp.) for their production. Due to the current CITES regulation of January 2017 regarding the trade of tropical woods, it becomes inevitable to generate alternative materials with similar material properties to be generated and established. Part of this study is an acoustic comparison of two guitars. One made of untreated tropical wood [Dalbergia nigra Benth.)] and one made of European thermally modified wood (TMT) species. [Pyrus (L.) and Alnus (Mill.)]. The method used allows a significant statement about the acoustic radiation performance of stringed and plucked instruments. The experimental setup consists of an impulse hammer for excitation of a force in the center of the bridge and a microphone for recording the signal radiated by the guitar body at a distance of one meter from the sound hole. A front-end was used to record the data, and further processing was done using analysis software to determine frequency response functions (FRFs) of the two instruments. The FRFs determined can be subdivided into several ranges which contain the different acoustic information about bass range, loudness, clarity, brightness and sharpness of the instruments. Examination of the frequency ranges reveals an acoustic similarity between the two guitars. Slight differences can be seen in the bass and loudness areas, where the guitar from TMT has a higher average level. Clearer differences are offered by the areas of clarity, where the guitar made of tropical wood shows a higher average level. In summary, the method gives an efficient acoustic impression as a function of the natural frequencies of the two guitars. The measured data show similarities and thus comparable acoustic properties of the instruments. However, additional effects such as psychoacoustic sensations or musical taste for the complete acoustic impression of an instrument are also of importance. Therefore, further empirical and fundamental research is needed to obtain a more detailed acoustic impression of the instruments. KW - TMT KW - FRF KW - guitar Y1 - 2018 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:eb1-opus-2850 ER -