For the acoustic testing the instrument was observed from three directions. The examination of the results verify the known cutoff frequency of woodwinds at medium frequencies. From the experimental investigation, two distinct new frequency ranges are found for the radiation properties of the bassoon. The first located range between the medium and the high frequencies of the bassoon modes shows that the central radiation is emitted by the bell, but the last open woodwind holes are also a part of the sound radiation. The second noticed range is located at high frequencies and it becomes clear that the sound radiation is only emitted by the last open holes. However, there is no sound radiation by the bell at these frequencies.
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