A smart mask system comprising: a main body including: a back frame defining a first opening and a first border surrounding the first opening, the first border providing a surface configured to engage a replaceable filter, and a front cover, wherein the front cover is at least partially removably attached to the back frame, the front cover defines a second opening aligned with the first opening of the back frame when the front cover is attached to the back frame, and the front cover further defines a second border surrounding the second opening, wherein at least a portion of the second border of the front cover is configured to removably attach to the first border of the back frame to enable replacement of the filter, or the main body is a single unitary component and a receptacle for receiving the filter is formed in the main body; a microphone embedded in the back frame and configured to receive an utterance from a mask wearer; a speaker embedded in the front cover; a processor located in the main body and coupled to the microphone and the speaker, the processor programmed to (i) receive signals representing the utterance, (ii) execute a speech enhancement model stored in memory to enhance the utterance, and (iii) output signals to cause the speaker to output sound based on the enhancement of the utterance; and a proximity sensor embedded in the main body, coupled to the processor, and configured to detect a distance from the proximity sensor to a person, wherein the processor is configured to dynamically adjust the output volume of the speaker based on the distance between the mask wearer and another person as indicated by the proximity sensor. a main body including: a back frame defining a first opening and a first border surrounding the first opening, the first border providing a surface configured to engage a replaceable filter, and a front cover, wherein the front cover is at least partially removably attached to the back frame, the front cover defines a second opening aligned with the first opening of the back frame when the front cover is attached to the back frame, and the front cover further defines a second border surrounding the second opening, wherein at least a portion of the second border of the front cover is configured to removably attach to the first border of the back frame to enable replacement of the filter, or the main body is a single unitary component and a receptacle for receiving the filter is formed in the main body; a back frame defining a first opening and a first border surrounding the first opening, the first border providing a surface configured to engage a replaceable filter, and a front cover, wherein the front cover is at least partially removably attached to the back frame, the front cover defines a second opening aligned with the first opening of the back frame when the front cover is attached to the back frame, and the front cover further defines a second border surrounding the second opening, wherein at least a portion of the second border of the front cover is configured to removably attach to the first border of the back frame to enable replacement of the filter, or the main body is a single unitary component and a receptacle for receiving the filter is formed in the main body; a microphone embedded in the back frame and configured to receive an utterance from a mask wearer; a speaker embedded in the front cover; a processor located in the main body and coupled to the microphone and the speaker, the processor programmed to (i) receive signals representing the utterance, (ii) execute a speech enhancement model stored in memory to enhance the utterance, and (iii) output signals to cause the speaker to output sound based on the enhancement of the utterance; and a proximity sensor embedded in the main body, coupled to the processor, and configured to detect a distance from the proximity sensor to a person, wherein the processor is configured to dynamically adjust the output volume of the speaker based on the distance between the mask wearer and another person as indicated by the proximity sensor.