Method and device for acute sound detection and reproduction
Earpieces and methods for acute sound detection and reproduction are provided. A method can include measuring an external ambient sound level (xASL), monitoring a change in the xASL for detecting an acute sound, estimating a proximity of the acute sound, and upon detecting the acute sound and its proximity, reproducing the acute sound within an ear canal, where the ear canal is at least partially occluded by an earpiece. Other embodiments are disclosed.
1. An earphone comprising:
a first microphone configured to measure an ambient acoustic environment, wherein the first microphone has a first microphone port that is configured to face away from a user when the earphone is inserted;
a second microphone configured to measure an acoustic environment closer the ear canal of a wearer than that measured by the first microphone, wherein the second microphone has a second microphone port that is configured to face toward the user when the earphone is inserted;
a speaker configured to play an audio signal;
a memory that stores instructions; and
a processor that is configured to execute the instructions to perform operations, wherein the processor is coupled to the first microphone, wherein the processor is coupled to the second microphone, wherein the speaker is coupled to the processor, and the operations comprising:
receiving a first microphone signal from the first microphone;
receiving a second microphone signal from the second microphone;
generating an ambient sound signal from at least one of the first microphone signal or the second microphone signal or a combination of both signals;
applying an ambient sound gain to the ambient sound signal to generate a modified ambient sound signal;
mixing the modified ambient sound signal with an audio content signal to generate a mixed audio signal; and
sending the mixed audio signal to the speaker.
2. The earphone according to claim 1 , where the operations further comprise:
detecting an acute sound by analyzing at least one of the first microphone signal or the second microphone signal or a combination of both signals; and
determining whether the acute sound is a user's voice by analyzing at least one of the first microphone signal or the second microphone signal or a combination of both signals.
3. The earphone according to claim 2 , where the operations further comprise:
determining whether the acute sound is a warning sound or siren by analyzing the spectrum of at least one of the first microphone signal or the second microphone signal or a combination of both signals.
4. The earphone according to claim 3 , where the operations further comprise:
decreasing a volume of the audio playback when a warning or siren is detected.
5. The earphone according to claim 4 , where the operations further comprise:
sending a notification signal to the speaker.
6. The earphone according to claim 4 , wherein the warning is at least one of a bell or the sound of an emergency vehicle or the sound of a security system or a combination.
7. The earphone according to claim 4 , wherein the siren is at least one of a police siren or an ambulance siren or a car honking or a combination.
8. The earphone according to claim 2 , where the operations further comprise:
adjusting the mixed audio signal when the user's voice is detected.
9. The earphone according to claim 8 , where the operation of adjusting the mixed audio signal is to reduce the audio content signal and increase the ambient sound signal.
10. The earphone according to claim 9 , where the mixed audio signal includes a noise reduction signal derived from the second microphone signal.
11. The earphone according to claim 1 , wherein the earphone includes a sealing section.