Abstract: A stereophonic apparatus uses three speakers respectively installed toward a front of a vehicle on both shoulders of a seat back of a driver's seat and toward a back of the vehicle on an exact center in front of a driver. This configuration provides more effectively exerted positioning effects for a virtual sound source realized by using the three speakers, especially for the effects in a frontward field of sound.

Abstract: A stereophonic apparatus uses three speakers respectively installed toward a front of a vehicle on both shoulders of a seat back of a driver's seat and toward a back of the vehicle on an exact center in front of a driver. This configuration provides more effectively exerted positioning effects for a virtual sound source realized by using the three speakers, especially for the effects in a frontward field of sound.

Abstract: A method of preserving colored images formed by exposing imagewise a heat developable color photosensitive element which has a construction which includes, on a support, at least a photosensitive silver halide, a binder and a dye providing substance which forms or releases a diffusible dye in proportion, or in inverse proportion, to a reaction in which the silver halide is reduced to silver; thereafter or simultaneously heating said element to form a diffusible dye; and transferring the diffusible dye image to a dye fixing element, wherein the photosensitive element or the dye fixing element further comprises at least one of a compound of which the quenching rate constant for the excited triplet of arylazonaphthol yes is at least 1.times.10.sup.5 M.sup.-1 .multidot.sec.sup.-1 and a compound of which the quenching rate constant for singlet state oxygen is at least 1.times.10.sup.7 M.sup.-1 .multidot.sec.sup.-1.

Abstract: A color photographic silver halide light-sensitive material is described, characterized by containing at least one of the compounds represented by the general formula (I) and their precursors. ##STR1## wherein R represents ##STR2## (wherein R.sub.1 and R.sub.2 are each a hydrogen atom or an alkyl group and may combine with R.sub.3 to form a ring having 5 to 10 carbon atoms, provided that R.sub.1 and R.sub.2 are not hydrogen atoms at the same time, R.sub.3 is a substituted or unsubstituted aryl group, and n is an integer of 1 to 4), and R' has 1 to 20 carbon atoms and represents a substituted or unsubstituted alkyl group, a substituted or unsubstituted cycloalkyl group, a substituted or unsubstituted aryl group, or a substituent defined by R as defined above). This light-sensitive material provides color images which are stabilized, i.e., freed of fading and the discoloration of the white ground.