A method comprising: operating a portable electronic device with at least a first acoustic port including a first portion of a housing having a first aperture, a first speaker acoustically coupled to the first aperture, a first pressure sensing transducer acoustically coupled to the first aperture, and a first acoustic chamber within the housing for radiating a first acoustic pressure beyond the housing, and a second acoustic port including a second portion of the housing having a second aperture, a second speaker acoustically coupled to the second aperture, a second pressure sensing transducer acoustically coupled to the second aperture, and a second acoustic chamber within the housing for radiating a second acoustic pressure beyond the housing; generating the first acoustic pressure by providing a first audio signal to the first speaker; generating the second acoustic pressure by providing a second audio signal to the second speaker; determining a presence of an obstruction of the first acoustic port; in response to the determining, altering generation of the first acoustic pressure by reducing an amplitude of at least lower frequency components of the first audio signal and providing the resulting signal to the first speaker instead of the first audio signal; and further in response to the determining, altering generation of the second acoustic pressure, the altering comprising: increasing an amplitude of the second audio signal, and combining the increased amplitude second audio signal with a portion of the first audio signal having the lower frequency components and providing the combined signal to the second speaker instead of the second audio signal. operating a portable electronic device with at least a first acoustic port including a first portion of a housing having a first aperture, a first speaker acoustically coupled to the first aperture, a first pressure sensing transducer acoustically coupled to the first aperture, and a first acoustic chamber within the housing for radiating a first acoustic pressure beyond the housing, and a second acoustic port including a second portion of the housing having a second aperture, a second speaker acoustically coupled to the second aperture, a second pressure sensing transducer acoustically coupled to the second aperture, and a second acoustic chamber within the housing for radiating a second acoustic pressure beyond the housing; generating the first acoustic pressure by providing a first audio signal to the first speaker; generating the second acoustic pressure by providing a second audio signal to the second speaker; determining a presence of an obstruction of the first acoustic port; in response to the determining, altering generation of the first acoustic pressure by reducing an amplitude of at least lower frequency components of the first audio signal and providing the resulting signal to the first speaker instead of the first audio signal; and further in response to the determining, altering generation of the second acoustic pressure, the altering comprising: increasing an amplitude of the second audio signal, and combining the increased amplitude second audio signal with a portion of the first audio signal having the lower frequency components and providing the combined signal to the second speaker instead of the second audio signal. increasing an amplitude of the second audio signal, and combining the increased amplitude second audio signal with a portion of the first audio signal having the lower frequency components and providing the combined signal to the second speaker instead of the second audio signal.