What is the resonant frequency of the ear canal (EAC)?

The resonant frequency of the ear canal, also known as the external auditory canal (EAC), is typically around 2700 Hz. This frequency represents the point at which the ear canal naturally resonates, amplifying sound waves at this specific frequency due to the physical characteristics and dimensions of the canal.

Understanding the resonant frequency is important for hearing instrument specialists, as it helps in predicting how sound will behave when traveling through the ear canal. When designing hearing aids, knowledge of the ear canal's resonance can guide adjustments and settings to enhance sound quality, ensuring that frequencies around this resonant point are delivered effectively to the ear. Consequently, this ensures optimal amplification and clarity of sound for the user.

The other options, while they may represent different frequencies, do not accurately reflect the typical resonant frequency of the ear canal. Frequencies that are significantly lower or higher than 2700 Hz would not align with the anatomical properties of the EAC and could lead to less effective sound amplification in that region.