BSWA XSW Series Mid‑Frequency Impedance Tubes: Accurate Across the Whole Mid Band
2026-05-14
1. Overview
XSW Series is a mid‑frequency dedicated impedance tube based on the transfer‑function method, designed as a perfect complement to the SW Series. It delivers high efficiency and accuracy for 100 Hz–4 kHz mid‑band material acoustic testing.
2. Core Advantages
High Precision & Efficiency
- Dual‑microphone transfer‑function method
- One test yields full‑band material acoustic properties
- Eliminates manual adjustment errors
- Greatly improves speed and accuracy
Strong Mid‑Frequency Adaptability
- 50 mm inner diameter (between 100 mm and 29 mm standard tubes)
- Ideal for 100 Hz–4 kHz mid‑frequency measurement
- One tube covers full mid‑band testing
User‑Friendly Structure
- Upgraded sealing and snap‑fit connection
- Improved acoustic isolation
- Compact and lightweight
- Fast, easy sample replacement
3. Key Features
Professional Measuring Principle
- Transfer‑function method for one‑test full‑range data
- Works with MCR software to compute:
- Sound absorption coefficient
- Reflection coefficient
- Specific acoustic impedance
- Transmission loss
- Wave number
High‑Performance Hardware
- 4 Ω speaker: 10 W rated, 30 W peak
- Stable signal via banana plug
- Supports 1/4” microphones
- Detachable sample tube for fast installation
- Dual microphone spacing: 30 mm / 70 mm for extended bandwidth
Strong Environmental Resistance
- Operating temperature: −10 °C to 50 °C
- Humidity: 5%–95% RH (non‑condensing)
- Error control:
- <5% at 50 Hz–4 kHz
- <10% at 5 kHz–6.4 kHz
4. Model Comparison Table
| Parameter | XSW4301 | XSW4331 |
|---|---|---|
| Frequency Range | 100 Hz – 4 kHz | 100 Hz – 4 kHz |
| Inner Diameter | 50 mm | 50 mm |
| Microphones | 2 × 1/4” | 4 × 1/4” |
| Tube Length | 757 mm | 1087 mm |
| Operating Environment | −10°C~50°C, 5%–95% RH | −10°C~50°C, 5%–95% RH |
5. Typical Applications
- Quantitative testing of mid‑frequency acoustic properties
- Construction materials
- Automotive interior parts
- Acoustic devices
- Provide accurate acoustic coefficients for simulation software
- COMSOL, ANSYS, etc.
- R&D, validation, and quality control
6. User Benefits
Reliable & Authoritative Data
Meets international acoustic standards; low measurement error.
High Efficiency & Convenience
One‑test full parameters; fast sample change; saves time.
Cost Effective
One tube for full mid‑band; reduces equipment investment.
Strong Adaptability
Supports lab and field testing; wide environment tolerance.
7. FAQ
Q1: What frequency range does XSW Series cover?
A1: 100 Hz – 4 kHz (mid‑frequency dedicated).
Q2: What is the inner diameter?
A2: 50 mm, optimized for mid‑band testing.
Q3: What measurement method is used?
A3: Dual‑/quad‑microphone transfer‑function method.
Q4: What parameters can be measured?
A4: Absorption coefficient, impedance, transmission loss, reflection coefficient, wave number.
Q5: Is it suitable for field testing?
A5: Yes; compact, lightweight, and wide environmental tolerance.
References
1 BSWA Technology Co., Ltd. XSW Series Impedance Tube Product Datasheet.
2 ISO 10534-2 Acoustics – Determination of sound absorption coefficient and impedance in impedance tubes.
