驱动电平
驱动（激励）电平是对换能器受电激励强弱程度的一般性描述。通常分为三种情形：
- 信号（仪器）电平。通常低于 1 伏（例如用于阻抗分析仪）。
- 低（仪器）电平。通常低于 10 伏（例如用于信号发生器）。此情形也可涵盖信号电平情形。此时产生的振幅较低，一般不存在发热和非线性效应。
- 高电平。对于电源和功率放大器，通常达数百伏。此时振幅接近换能器的工作振幅，可能出现明显的发热和非线性效应。
Drive level
The drive (excitation) level is a general description of how hard a transducer is electrically excited. Three regimes are typically noted:
- Signal (instrumentation) level. This is typically less than one volt (e.g., for impedance analyzers).
- Low (instrumentation) level. This is typically less than 10 volts (e.g., for signal generators). This regime may also include the signal level regime. The resulting amplitudes are low; heating and nonlinear effects are generally not present.
- High level. This is typically several hundred volts for power supplies and power amplifiers. This gives amplitudes near the operational amplitude of the transducer; significant heating and nonlinear effects may occur.