Although simultaneous satellite results from VLF, LF, and MF receivers and low-energy electron detectors have in the past few years demonstrated that electrons with energies of a few hundred electron volts are the source of the auroral hiss band in the day side cleft region, the source of the hiss in the night side auroral zone has not been clearly identified. To deduce the origin of this hiss, we have compared the records of a VLF experiment (0.3--18 kHz) of the Ogo 4 spacecraft with simultaneous data obtained by the same satellite on precipitating electrons at 0.7, 2.3, and 7.3 keV. As a general observation, at these energies the correlation with VLF auroral hiss is best at 0.7 keV and worst at 7.3 keV. From a detailed inspection of the records we have concluded that while auroral electrons in the keV range may enhance the intensity of VLF auroral hiss on the night side, electrons of energies below about 0.7 kev are the predominant source of the night side hiss as well. The observation that whenever auroral hiss is observed, it tends to occur simultaneously over a broad range of frequencies strongly suggests that hiss of all frequencies is generated by electrons of essentially the same energy range, i.e., by those with energies below about 1 keV. This conclusion is supported by the results of a study based on Ogo 6 data which revealed a lack of correlation between keV electrons and LF auroral hiss. We have also concluded that in the day side cleft the excellent correlation between auroral hiss and 0.7-keV electrons is maintained in situations in which the region of very soft electron precipitation is in motion. In the absence of soft electron data, auroral hiss records can thus be used in studies relating to the cleft location and motions.