Abstract: Systems and methods for enhancing performance of a microphone are disclosed. An airflow control system may include a block-shaped structure and an airflow impedance element residing within a cavity of the block-shaped structure. The airflow impedance element may be formed by filling the cavity with a plurality of pre-processed airflow impedance elements and sintering these elements, and may include a plurality of non-linear pathways. The plurality non-linear pathways may both impede airflow therethrough (e.g., when a force exerted by the airflow exceeds a predetermined amount) and pass sound that may match a frequency response of a microphone without substantially affecting the amplitude and frequency characteristics of the sound.

Abstract: Systems and methods for controlling airflow into an electronic device are disclosed. An airflow control system may include an airflow impedance plate having one or more airflow impeding features. The airflow impedance plate may be a passive device that may be configured to impede forceful airflow therethrough and also allow sound to pass therethrough.

Abstract: Systems and methods for controlling airflow into an electronic device are disclosed. An airflow control system may include an airflow impedance plate having one or more airflow impeding features. The airflow impedance plate may be a passive device that may be configured to impede forceful airflow therethrough and also allow sound to pass therethrough.

Abstract: Systems and methods for enhancing performance of a microphone are disclosed. An airflow control system may include a block-shaped structure and an airflow impedance element residing within a cavity of the block-shaped structure. The airflow impedance element may be formed by filling the cavity with a plurality of pre-processed airflow impedance elements and sintering these elements, and may include a plurality of non-linear pathways. The plurality non-linear pathways may both impede airflow therethrough (e.g., when a force exerted by the airflow exceeds a predetermined amount) and pass sound that may match a frequency response of a microphone without substantially affecting the amplitude and frequency characteristics of the sound.

Abstract: In one embodiment, an equalizer outputs a compensated received signal that flattens the acoustic frequency response characteristic of a handset having a leak tolerant ear piece. A hardware based filter is implemented within the handset having a response matched to the response of the equalizer so that the acoustic and magnetic frequency responses of the handset are substantially flat over the audible frequency range to comply with regulatory requirements.

Abstract: In one embodiment, an equalizer outputs a compensated received signal that flattens the acoustic frequency response characteristic of a handset having a leak tolerant ear piece. A hardware based filter is implemented within the handset having a response matched to the response of the equalizer so that the acoustic and magnetic frequency responses of the handset are substantially flat over the audible frequency range to comply with regulatory requirements.

Abstract: The present invention provides a power negotiation protocol that enables PDs and PSEs to negotiate the amount of inline power that a PD consumes and the corresponding PSE provides. This power negotiation allows the PDs provide fine-grained power consumption level to PSEs, and the PSEs are able to manage inline power efficiently using the negotiation protocol of the present invention. The PDs can ask the PSEs for more power when needed rather than having to constantly reserve the maximum amount of power they can consume at all times. Similarly, the PDs can release reservation of excess power when their respective power requirements decrease. The PSEs can limit the amount of power that can be consumed by the PD, thereby providing the ability for an administrator to control how much power a given PD can consume.