This slide illustrates the capacitance characteristics when tantalums are used at various temperatures. As can be seen here, the capacitance values of tantalum capacitors are very steady over wide temperature ranges. Conversely, when a ceramic capacitor is used at either low or high temperatures, capacitance decreases. For example, when both tantalum and ceramic capacitors are used as a smoothing capacitor, there is good performance at room temperature. However, in cold and/or high temperature, the capacitance of a ceramic capacitor decreases and, consequently, its smoothing ability decreases. Another example would be when both tantalum and ceramics are used as DC coupling for sound output. Normally, better performance is achieved by the tantalum capacitor due to their characteristic larger capacitance in the same size. Note that the capacitance difference increases significantly as temperature either increases or decreases as referenced to room temperature.