The miniDSP EARS, also known as the H.E.A.R.S. (Headphone & Earphone Audio Response System), is a headphone testing rig designed to measure and analyze the performance of headphones. It utilizes microphones placed in simulated ears to capture data, enabling users to evaluate the acoustic properties of headphones. This article provides an overview of the miniDSP EARS, its components, and a comparison with other commercial headphone measurement rigs.
Anatomy of a Headphone Measurement Rig:
Most headphone testing rigs consist of three essential parts: the stand, the interface surface (simulated ears), and the microphones. The stand is responsible for holding the interface surface and the headphones securely. Higher-end stands are designed to dampen unwanted acoustic noise or vibrations for precise measurements. For realistic testing, some commercial rigs use head and torso simulators (HATS) that mimic human head and upper body characteristics.
The Interface Surface (Simulated Ears):
The miniDSP EARS features a pair of molded silicone ears with embedded microphones. These simulated ears attempt to replicate the average acoustic properties of human ears, including the shape and size of pinnae and ear canals. However, since each human ear is unique, achieving a universally accurate simulation is challenging.
Microphones and Connectivity:
The EARS is built around the miniDSP UMIK-1 electret microphone technology. The microphones placed within the simulated ears capture the sound output from the headphones. The rig connects to a computer via a standard USB A-B printer cable. It does not require any additional drivers for operation on Windows, Linux, or Apple OS.
Affordability:
The miniDSP EARS stands out among commercial headphone measurement rigs for its affordability. It is significantly less expensive than other options on the market, making it a popular choice for headphone enthusiasts and audio professionals.
Comparison with Other Headphone Measurement Rigs:
- miniDSP EARS USB Headphone Test Fixture: Priced at $200, this rig offers a cost-effective solution for headphone testing.
- GRAS 45CC Headphone Test Fixture: Approximately $6,100, this option is more expensive but offers advanced features.
- GRAS 43AG Ear and Cheek Simulator: Priced at around $7,500, this rig uses silicone-based simulated ears like the miniDSP EARS.
- Audio Precision AECM206: The most expensive option at about $11,000, it is a high-end test rig for professional use.
- GRAS 45BB-9 KEMAR with Anthropometric Pinnae: This top-of-the-line rig, priced at around $26,000, provides highly accurate measurements.
Conclusion:
The miniDSP EARS, or H.E.A.R.S., is a budget-friendly headphone test fixture designed for accurately measuring headphone performance. It employs simulated silicone ears with embedded microphones and offers a cost-effective solution for audio enthusiasts and professionals. While no simulation can fully replicate the complexities of human ears, the miniDSP EARS provides valuable insights into headphone audio response, making it a valuable tool in the audio testing arena.