impedance
의미: The total opposition that a circuit presents to alternating current, combining both resistance and reactance, measured in ohms and represented as a complex number.
Impedance generalises the concept of resistance to AC circuits, where the effects of capacitance and inductance must also be considered. Impedance matching — ensuring that source and load impedances are compatible — is critical in audio systems, radio transmission, and telecommunications. In medicine, bioelectrical impedance analysis estimates body composition. The term is occasionally used figuratively to mean any form of obstruction.
예문
- The audio engineer ensured that the speaker impedance matched the amplifier output for optimal power transfer. 音频工程师确保扬声器阻抗与功放输出匹配,以实现最佳功率传输。El ingeniero de audio se aseguró de que la impedancia del altavoz coincidiera con la salida del amplificador para una transferencia de potencia óptima.音響技術者は、最適な電力伝送のためにスピーカーのインピーダンスがアンプの出力と一致するよう確認した。음향 엔지니어는 최적의 전력 전달을 위해 스피커 임피던스가 앰프 출력과 일치하는지 확인했다.
- Impedance mismatch between the antenna and the transmission line caused significant signal reflection and power loss. 天线与传输线之间的阻抗不匹配导致了严重的信号反射和功率损耗。La desadaptación de impedancia entre la antena y la línea de transmisión provocó una reflexión de señal y una pérdida de potencia significativas.アンテナと伝送線路間のインピーダンス不整合が、大幅な信号反射と電力損失を引き起こした。안테나와 전송 선로 사이의 임피던스 불일치로 상당한 신호 반사와 전력 손실이 발생했다.
- Bioelectrical impedance analysis was used to estimate the patient's body fat percentage during the health assessment. 生物电阻抗分析被用于在健康评估中估算患者的体脂百分比。El análisis de impedancia bioeléctrica se utilizó para estimar el porcentaje de grasa corporal del paciente durante la evaluación sanitaria.健康評価において、生体電気インピーダンス分析が患者の体脂肪率の推定に使用された。건강 평가 시 생체전기 임피던스 분석이 환자의 체지방률 추정에 사용되었다.
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사용 가이드
맥락: scientific, academic, professional
어조: neutral
기원과 역사
From Latin impedire (to shackle the feet, hinder), from in- (in) and pes, pedis (foot). The electrical term was coined by Oliver Heaviside in 1886.
문화적 배경
Era: Modern
Generation: All ages
Social background: Universal
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