01461nas a2200097   4500008004100000245008700041210006900128520088200197100002401079856026001103       2018                        eng d00aBird vocalizations: seven different types of Great tit (Parus major) vocalizations0 aBird vocalizations seven different types of Great tit Parus majo3 a<p>The Great tit (Parus major) produces a large variety in calls and songs. Seven different types of vocalizations are described in this paper. Interesting is that those types differ in (acous- tic) structure. Three structures can be observed: 1) a vocalization can be &#39;tonal&#39;; a pure tone, usually in time varying in frequency (often a so-called &#39;upsweep&#39;); 2) a vocalization can be &#39;pulsed&#39;, a series of pulses consisting of a fundamental frequency on which the pulse repetition frequency is superimposed; the pulse repetition rate is between 210 and 240 pulses/s; 3) a vo- calization can be pulsed, however, with a &lsquo;semi-broadband&rsquo; spectrum. Great tit vocalizations are concentrated around two frequency ranges: around 4 kHz and around 8 kHz. The duration of vocalization components is rather limited, usually between 95 and 130 ms.</p>
1 aVerboom, Willem, C.  uhttps://www.researchgate.net/profile/Willem_Verboom2/publication/329390530_Bird_vocalizations_seven_different_types_of_Great_tit_Parus_major_vocalizations/links/5c1618f34585157ac1c5cbaa/Bird-vocalizations-seven-different-types-of-Great-tit-Parus-major-voc