Open pipe ends reflect low frequencies but pass high frequencies

Related

• Each open-end reflection filters out high frequencies until the fundamental remains (similarity 0.88)
• Short wavelengths escape open pipe ends while long wavelengths reflect back (similarity 0.86)
• A flue pipe’s sound arises from air passing a slit and striking a wedge (similarity 0.85)
• Finger-hole diameters determine where a pipe’s effective opening lies (similarity 0.81)
• Open tube ends preferentially transmit high frequencies and reflect low ones, smearing echoes. (similarity 0.81)
• An open pipe end inverts a sound pulse’s sign via a reflected rarefaction (similarity 0.80)
• Beats arise when two close frequencies combine in unresolved filters (similarity 0.80)
• Constricting a tube at a pressure node lowers the modal frequency (similarity 0.79)
• Filtering a signal to narrow its bandwidth necessarily spreads it in time. (similarity 0.79)
• Impedance mismatch determines whether a sound pulse reflects or passes (similarity 0.79)
• Frequency, wavelength, and velocity determine one another (similarity 0.79)
• Open-open and open-closed tubes produce different harmonic series (similarity 0.79)
• Critical band bandwidths grow from 100 Hz to over 2 kHz with frequency (similarity 0.79)
• A sound pulse passes an open pipe end unreflected when matching pressure exists outside (similarity 0.79)
• Wind instruments resonantly amplify only frequencies that reflect back at the drive period (similarity 0.79)