33.160.50 Auxiliaries. Including headphones, loudspeakers, microphones, etc. / Вспомогательные устройства. Включая наушники, громкоговорители, микрофоны и т.д.
Ключевые слова:
Earphones|Classification systems|Comparative tests|Headphones|Testing conditions|Audio systems|Acoustic testing|Electrical properties and phenomena|Ratings|Instructions for use|Designations|Acoustic measurement|Marking|Frequency response|Voltage measurement|Impedance measurement|Electrical wave measurement|Audio equipment|Microphones