The housing and component integration of a speaker can affect its frequency response, sometimes causing large peaks in the response that are objectionable from the perspective of a listener. This disclosure describes techniques to improve the frequency response of a speaker by using a small resonator in the housing that can absorb the acoustic energy of an unwanted peak in the response. The resonator can be in the form of a relatively large cavity. Acoustic energy from the speaker can be fed into the cavity using a small channel. The geometry of the channel and the cavity can be tuned to the frequency that poses a problem, e.g., exhibits the unwanted peak.
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Dix, Gordon, "Using Resonators to Improve the Acoustic Response of a Speaker", Technical Disclosure Commons, (May 15, 2023)