A newly announced lavalier microphone is drawing significant attention within the professional audio engineering community due to its unprecedented noise performance, specified at an equivalent noise level of 11 dB SPL. While the manufacturer’s documentation refers to this figure as an “equivalent noise specification,” it is technically aligned with what is more precisely defined in electroacoustic terms as Equivalent Input Noise (EIN).
This distinction, though subtle in nomenclature, is critical in understanding the device’s performance envelope. Equivalent Input Noise represents the self-noise of the microphone system referred back to the input, effectively quantifying the minimum acoustic signal level that can be resolved above the inherent noise floor of the transducer and internal electronics. At 11 dB SPL, the microphone operates near the lower physical limits imposed by thermal noise and air molecule agitation, positioning it among the quietest commercially available transducers to date.
For context, the majority of competing lavalier microphones exhibit self-noise figures around or exceeding 24 dB SPL. This disparity of over 13 dB is not incremental but exponential in perceptual and technical terms, corresponding to a substantial reduction in perceivable noise. Such a low EIN enables the capture of extremely quiet sound sources, such as distant ambiences, subtle room reverberations, or whispering, without necessitating post-processing noise reduction, preserving precious original acoustic detail.
From a circuit design perspective, achieving an EIN of 11 dB SPL means the analog signal path must be carefully shielded against electromagnetic interference, as well as careful voltage regulation to suppress ripple and broadband noise contributions.
The mechanical design of the capsule further contributes to minimizing noise introduced by microphonic effects and air turbulence.
More information will become available as soon as samples arrive. Pricing and availability to follow in due course.
