How can a receptive field in the auditory system be described by sound frequencies?

In the auditory system, a receptive field can be described as the specific set of sound frequencies to which a sensory neuron responds. Because hair cells are tuned to particular frequencies and are arranged at distinct locations along the basilar membrane, there is a spatial relevance to these auditory receptive fields.1

Physiologically, most neurons in the auditory pathway exhibit a "best frequency"—the specific frequency at which the neuron responds to the lowest sound intensity. As the intensity of a sound stimulus increases, the neuron typically responds to a broader band of frequencies, reflecting the tuning properties of the basilar membrane.2

Furthermore, researchers use techniques such as spike-triggered averaging and reverse correlation to characterize the spectrotemporal response field of auditory neurons, which captures how a cell's selectivity for specific frequencies and temporal patterns evolves over time. While peripheral neurons may respond primarily to pure tones, central neurons often demonstrate more complex stimulus requirements, such as responding to frequency-modulated sounds.1