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RMS ÂèÍÁÒ¨Ò¡ Root-Means-Square
à¾ÒàÇÍÃì ÍÒÃìàÍçÁàÍÊ ¤×Í¡ÓÅѧà©ÅÕè ·Õèà¤Ã×èͧàÊÕ§»ÅèÍÂÍÍ¡ÁÒä´éÍÂèÒ§µèÍà¹×èͧ µÑÇÍÂèÒ§àªè¹ 1,000W RMS

dB ÂèÍÁÒ¨Ò¡ à´«ÔàºÅ (Íѧ¡ÄÉ: decibel, dB) à»ç¹Ë¹èÇÂÇÑ´à·ÕºÍѵÃÒÊèǹÃÐËÇèÒ§»ÃÔÁÒ³àÊÕ§Êͧ»ÃÔÁÒ³ ãªéÊÓËÃѺÇÑ´¤ÇÒÁ´Ñ§¢Í§àÊÕ§ ¤Ô´¤é¹â´Â Alexander Graham Bell ¹ÔÂÁãªé¡Ñ¹Áҡ㹷ҧͤÙʵԡ ¿ÔÊÔ¡ÊìáÅÐÍÔàÅç¡·Ã͹ԡÊì à´«ÔàºÅà»ç¹Ë¹èÇÂÇÑ´·ÕèäÁèÁÕ˹èÇÂàËÁ×͹¤èÒà»ÍÃìà«ç¹µì ˹èÇÂà´«ÔàºÅà»ç¹Ë¹èÇ·ÕèÊÒÁÒöáÊ´§¤èÒÊÙ§áÅФèÒµèÓà»ÃÕºà·Õº¡Ñ¹ä´éà¹×èͧ¨Ò¡¤Ó¹Ç³¨Ò¡¡ÒÃËÒÅÍ¡ÒÃÔ·ÖÁ ÃдѺഫÔàºÅ·Õè¶Ö§¢Ñé¹ÍѹµÃÒ¢ͧ¤¹ËÙ»¡µÔ¤×Í 85 à´«ÔàºÅ¢Öé¹ä» (ËÅѧ¨Ò¡ÃѺ¿Ñ§ËÅÒªÑèÇâÁ§)

SPL ÂèÍÁÒ¨Ò¡ «ÒÇ´ìà¾ÃÊàªÍÃìàÅàÇÅ (Sound Pressure Level) ÁÕ˹èÇÂÇÑ´¤èÒ¤ÇÒÁ´Ñ§ÊÙ§ÊØ´¢Í§àÊÕ§ãªé˹èÇÂÇÑ´à»ç¹dBäÁèÁÕ¡Ó˹´¤èÒÁҵðҹ¶éÒ SPL ÂÔè§ÁÕ¤èÒ·ÕèÁÒ¡ ËÁÒ¶֧¤ÇÒÁ´Ñ§àÊÕ§·Õè´Ñ§à¾ÔèÁ¢Öé¹ áÅÐ ã¹¢³Ðà´ÕÂǡѹ ¶éÒ SPL ÂÔè§ÁÕ¤èÒ·Õè¹éÍ ËÁÒ¶֧¤ÇÒÁ´Ñ§àÊÕ§·ÕèÁÕ¤ÇÒÁ´Ñ§Å´Å§

GND/LIFT ÂèÍÁÒ¨Ò¡ Ground-Lift ¤×Í»ØèÁ·ÕèãªéÊÓËÃѺµÑ´ Ground ¢Í§ÊÑ­­Ò³àÊÕ§·Õèàª×èÍÁµèÍÃÐËÇèÒ§ÍØ»¡Ã³ìãËéá¡ÍÍ¡¨Ò¡¡Ñ¹ à¾×èÍ»éͧ¡Ñ¹»Ñ­ËÒ Ground-Loop «Öè§à»ç¹·ÕèÁҢͧàÊÕ§ÎÑÁàÊÕ§¨Õè â´Âã¹Ê¶Ò¹¡Òóì»Ã¡µÔ»ØèÁ¹Õé¨Ð¶Ù¡¡´¡çµèÍàÁ×èÍà¨Í»Ñ­ËÒ Ground-Loop à·èÒ¹Ñé¹

âÍËìÁ (Íѧ¡ÄÉ: ohm) (ÊÑ­Åѡɳì : Ω) à»ç¹Ë¹èÇÂàÍÊäÍ (SI) ¢Í§¤èÒÍÔÁ¾Õá´¹«ì·Ò§ä¿¿éÒ ã¹¡Ã³Õ¢Í§¡ÃÐáÊÊÅѺ ËÃ×ͤèÒ¤ÇÒÁµéÒ¹·Ò¹ä¿¿éÒ ã¹¡Ã³Õ¢Í§¡ÃÐáʵç µÑ駪×è͵ÒÁà¡ÍÍÃì¤ «ÕÁç͹ âÍËìÁ ¹Ñ¡¿ÔÊÔ¡ÊìªÒÇàÂÍÃÁѹ

HF transducer ÂèÍÁÒ¡¨Ò¡ high frequency transducer ¤×Í µÑÇá»Å§ÊÑ­­Ò³¤ÇÒÁ¶ÕèÊÙ§

LH transducer ÂèÍÁÒ¡¨Ò¡ Low frequency transducer ¤×Í µÑÇá»Å§ÊÑ­­Ò³¤ÇÒÁ¶ÕèµèÓ

NFB ÂèÍÁÒ¨Ò¡ No Fuse Breaker ËÁÒ¶֧ äÁèµÑ´ª¹Ç¹ 

KHz ÂèÍÁÒ¨Ò¡ ¡ÔâÅàÎÔÃì·«ì (Íѧ¡ÄÉ : Kilohertz)
à»ç¹¤Å×蹤ÇÒÁ¶ÕèÁÕ¤èÒà·èҡѺ 1,000 àÎÔÃì·«ì à»ç¹Ë¹èÇÂÇÑ´¨Ó¹Ç¹ÃͺµèÍÇÔ¹Ò·Õ 1 ¡ÔâÅàÎÔÃì·«ì ¨Ö§à·èҡѺ˹Ö觾ѹÃͺµèÍÇÔ¹Ò·Õ ãªé¡Ñº¤ÇÒÁ¶Õè¤Å×è¹àÊÕ§ÊÙ§

Hz ÂèÍÁÒ¨Ò¡ àÎÔõ«ì (Íѧ¡ÄÉ: Hertz) à»ç¹Ë¹èÇÂ͹ؾѷ¸ìàÍÊäÍ (SI) «Öè§à»ç¹Ë¹èÇ¢ͧ¤èÒ¤ÇÒÁ¶Õè â´Â 1 Hz ¤×Í ¤ÇÒÁ¶Õè·Õèà·èҡѺ 1 ¤ÃÑé§ µèÍÇÔ¹Ò·Õ (1/s) ËÃ×Í 1Hz=1/S ´Ñ§¹Ñé¹ 50 Hz ËÁÒ¶֧ÁÕ¤ÇÒÁ¶Õèà·èҡѺ 50 ¤ÃÑ駵èÍ 1 ÇÔ¹Ò·Õ áÅÐãªé¡Ñº¤ÇÒÁ¶Õè¤Å×è¹àÊÕ§µèÓ
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˹èÇÂàÎÔõ«ìä´é¡Ó˹´¤ÃÑé§áá㹠¾.È. 2473 (¤.È. 1930) áÅéÇàÃÔèÁÁÒãªéá·¹ ˹èÇ ÃͺµèÍÇÔ¹Ò·Õ (cycles per second ËÃ×Í cps) ã¹»Õ ¾.È. 2503 (¤.È. 1960) µèÍÁÒã¹»Õ ¾.È. 2513 (¤.È. 1970) ˹èÇ Hz ä´éãªé·´á·¹¡ÒÃãªé cps á·º·Ñé§ËÁ´

W ÂèÍÁÒ¨Ò¡ Çѵµì (watt) à»ç¹Ë¹èÇÂàÍÊäͧ͢¡ÓÅѧ µÑ駪×è͵ÒÁà¨ÁÊì Çѵµì µÑÇÍÂèÒ§¾Åѧ§Ò¹ã¹Ë¹èÇÂÇѵµì àªè¹ ËÅÍ´ä¿·ÕèãªéµÒÁºéÒ¹ãªé 100 Çѵµì ¢³Ð·Õèà¢×è͹ÎÙàÇÍÃì¼ÅԵ俿éÒä´éÊͧ¾Ñ¹ÅéÒ¹Çѵµì

1 Çѵµì ÁÕ¤èÒà·èҡѺ 1 ¨ÙŢͧ¾Åѧ§Ò¹µèÍÇÔ¹Ò·Õ

âÇŵì Çѵµì áÍÁ»ì ᵡµèÒ§¡Ñ¹ÍÂèÒ§äÃ
âÇŵì (volt ËÃ×Í V) ¤×Í˹èÇ·ÕèãªéàÃÕ¡à¾×èͺ͡¢¹Ò´¢Í§áç´Ñ¹ä¿¿éÒ㹺éÒ¹ ÍÒ·Ô 220 V ËÁÒ¶֧ ¢¹Ò´¢Í§áç´Ñ¹ä¿¿éÒà·èҡѺ 220 âÇŵì (»ÃÐà·Èä·Â¡çãªéä¿Ãкº¹Õé)

áÍÁá»Ãì ËÃ×Í áÍÁ»ì (ampere ËÃ×Í A) ¤×Í˹èÇ·ÕèãªéàÃÕ¡ÊÓËÃѺºÍ¡»ÃÔÁÒ³¢Í§¡ÃÐáÊä¿¿éÒ·ÕèäËżèÒ¹µÑÇ¹Ó ËÃ×ÍÍØ»¡Ã³ìä¿¿éÒ¹Ñè¹àͧ ÍÒ·Ô 5 A ËÁÒ¶֧ »ÃÔÁÒ³¡ÃÐáÊä¿¿éÒ·ÕèäËżèÒ¹à·èҡѺ 5 áÍÁá»Ãì

Çѵµì (Watt) ¤×Í Ë¹èÇÂÇÑ´¡ÓÅѧ俿éÒ·Õèà»ç¹µÑǺ͡¾Åѧ§Ò¹ä¿¿éҢͧÍØ»¡Ã³ìËÃ×Íà¤Ã×èͧãªéä¿¿éÒ áµèÅЪ¹Ô´ãªé㹡Ò÷ӧҹ àªè¹ ËÅÍ´ä¿ 100 Çѵµì ËÁÒ¤ÇÒÁÇèÒ ËÅÍ´ä¿¡Ô¹ä¿ 100 ¨ÙŵèÍÇÔ¹Ò·Õ
1 W = 1 J/s = 1 ¹Ôǵѹ àÁµÃ µèÍÇÔ¹Ò·Õ = 1 kg·m2·s−3

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