[. . . ] The smooth Irequency response at elose talking distance gives a weil balanced and natural sound sensation. [. . . ] The microphone has a built-in pop lilter wh ich gives protection against pop noises when the microphone is held elose to the mouth. Further attenuation 01 pop noises will be obtained by using the additional popshield. T0 protect the inner shell against mechanical shocks or accidental dropping the gauze 01the SOUild inlet has been strengthened by an inner mechanical reinlarcement. The MD 409 U 3 comes with the additional pop shield and a quick release clamp. It ean be eonneeted to both balaneed and unbalanced inputs as long as they have an impedance 01 at least 200 Q. This means, that sound Irom the rear with a Ir'equency 011000 Hz produees a 17 dB lower signal than sound 01 the sarne intensity reaching the microphone lrom the Iront. So the rnax', Tnuminsensitivity to unwanted sound sources lies by 180°. As ean be seen lrom the polar diagram the microphone should be spoken into Irom the Iront (Fig. [. . . ] 2) Popshield The MD 409 U 3 is litted with a built-in popshield which serves to attenuate all explosive and sibilant sounds. [. . . ]