Вариант без костяной свистульки - с отверстием в самом наконечнике.
Источник: http://www.ancienttouch.com/medieval,%2 ... wheads.htm
IRON ARROWHEAD WITH A WHISTLE XII-XIV century
Lenticular in cross-section blade, the tang under the blade has bulbous element with opposed apertures, which served as a whistle. L. 3.4" ( 8.6 cm).
This form derived from iron arrowheads with bone whistles, placed at upper tang. Some scholars believe that during the flight, such arrows produced a whistling noise that frightened the foe's horses. According to the Secret History of the Mongols (section 115), a whistling arrow of this kind was given to Temüchin by Jamuka, who made it from the horns of a two-year old bull, glued together and pierced.
See: Y.Khudyakov. Vooruzhenie cental'noaziatskih kochevnikov v epohu rannego i razvitogo srednevekov'ya, Novosibirsk, 1991, fig.53-54.A.Kola, G.Wilke. Militaria z grodziska w Plemietach. Bron strzelcza [in:] Plemieta. Sredniowieczny grodek w ziemi chelminskiej, Torun, 1985, pp.112-114, table XII.