دليل شراء شدة الصوت
شدة الصوت هي تدفق طاقة الصوت لكل وحدة مساحة — كمية متجهة تحدد الاتجاه. تتيح لك قياس قدرة الصوت وتحديد المصادر في البيئات الصاخبة دون الحاجة إلى غرفة صامتة.
قياس الطاقة الصوتية
حدد قدرة الصوت لأي آلة أو منتج دون غرفة صامتة.
تحديد مصادر الضوضاء
حدد ترتيب مساهمة كل مكون في إجمالي الضوضاء.
تحليل مسارات الانتقال
قيس انتقال الصوت عبر الجدران والأرضيات والواجهات.
اختيار الفاصل المناسب لـ Nor1290
يحدد الفاصل نطاق التردد الصالح للقياس. يأتي طقم Nor1290 مع الفواصل الثلاثة.
المعدات المطلوبة
قياسات شدة الصوت تتطلب محللاً ثنائي القناة — ليس SLM أحادي القناة.
الأسئلة الشائعة
What is sound intensity and why measure it instead of sound pressure?
Sound intensity is the flow of sound energy per unit area (W/m²), measured as a vector quantity with both magnitude and direction. Unlike sound pressure, which is a scalar, intensity measurements can distinguish between sound coming from the source under test and background noise from other directions. This allows you to measure sound power and locate noise sources accurately in noisy factory or field environments without needing an anechoic chamber.
Which ISO standard applies to sound intensity measurements?
Sound power determination using sound intensity is covered by ISO 9614: ISO 9614-1 (discrete point method — simpler setup), ISO 9614-2 (scanning method — faster for larger or complex sources), and ISO 9614-3 (precision scanning — highest accuracy). The method you choose depends on source size, required accuracy grade, and time available. Nor850 Sound Intensity software supports all three methods.
How do I choose the right spacer for the Nor1290 intensity probe?
The spacer determines the useful frequency range. Use 6 mm for 250 Hz–10 kHz (high-frequency work, small sources), 12 mm for 125 Hz–5 kHz (most general applications — the default choice), and 50 mm for 31.5 Hz–1.25 kHz (low-frequency analysis, large machinery, HVAC). The Nor1290 kit includes all three spacers. For building acoustics flanking transmission path analysis, the 12 mm spacer covers the full ISO 16283 frequency range.
Do I need a special analyser for sound intensity, or can any Class 1 SLM be used?
Sound intensity requires a dual-channel analyser that can cross-correlate two phase-matched microphone signals in real time. The Nor150 with intensity firmware is purpose-designed for this. Standard single-channel SLMs like the Nor145 cannot perform intensity measurements. The Nor150 accepts the Nor1290 probe directly via its dual-input connector and runs the intensity calculation on-board.
What applications use sound intensity measurements?
Key applications include: (1) Sound power determination of machinery and products per ISO 9614 — required by CE/EU machinery directive for noise emission labelling; (2) Noise source identification and ranking on complex assemblies (automotive, HVAC, industrial equipment); (3) Sound transmission path analysis through building partitions and façades; (4) In-situ sound insulation testing of built assemblies. Sound intensity is particularly valuable when background noise is high and separating sources is critical.