What is IEC 60268-37?

IEC 60268-37 is a technical standard that specifies the methods for measuring and assessing the performance of electroacoustical devices and systems. These devices include microphones, loudspeakers, headphones, and more.

Sound Pressure Level (SPL)

One important parameter measured according to IEC 60268-37 is sound pressure level (SPL). SPL is a measure of the magnitude of a sound wave in air and is commonly expressed in decibels (dB). In order to assess the performance of electroacoustical devices, it is crucial to measure their output level accurately, and IEC 60268-37 provides the standardized guidelines for doing so.

Frequency Response

Another key aspect covered by IEC 60268-37 is frequency response. Frequency response refers to how well a device reproduces sounds at different frequencies. This is crucial because different audio sources contain various frequencies at different amplitudes. By setting standards for frequency response measurements, IEC 60268-37 ensures that audio devices provide accurate and balanced sound across the entire audible frequency range.

Harmonic and Intermodulation Distortion

IEC 60268-37 also addresses the measurement of harmonic and intermodulation distortion. Harmonic distortion occurs when an audio device introduces additional frequencies into the output signal that are multiples of the original input signal's frequencies. Intermodulation distortion occurs when multiple input signals combine within a device and produce additional unwanted frequencies. These types of distortion can negatively impact sound quality, and IEC 60268-37 offers guidance on evaluating and minimizing them.

In conclusion, IEC 60268-37 plays a crucial role in ensuring consistent and accurate performance of electroacoustical devices. By specifying standardized measurement methods, the standard helps manufacturers, audio engineers, and consumers evaluate and compare different devices based on their sound pressure level, frequency response, and distortion characteristics.