Method and device for personalized hearing
View Patent ↗An earpiece is provided that can include an Ambient Sound Microphone (ASM) to measure ambient sound, an Ear Canal Receiver (ECR) to deliver audio to an ear canal, an Ear Canal Microphone (ECM) to measure a sound pressure level within the ear canal, and a processor to produce the audio from at least in part the ambient sound, actively monitor a sound exposure level inside the ear canal, and adjust a level of the audio to within a safe and subjectively optimized listening level range based on the sound exposure level. An audio interface can deliver audio content from a media player. The processor can selectively mix the audio content with the ambient sound to produce the audio in accordance with a personalized hearing level (PHL) to permit environmental awareness of at least one distinct sound in the ambient sound. Other embodiments are disclosed.
1. An earpiece configurable for monitoring safe listening levels, comprising:
an Ambient Sound Microphone (ASM) configured to capture ambient sound;
an Ear Canal Receiver (ECR);
an Ear Canal Microphone (ECM) configured to monitor a sound pressure level (SPL) within an ear canal; and
a processor operatively coupled to the ASM, the ECR, and the ECM, the processor configured to: produce an audio signal from the ambient sound captured by the ASM, actively monitor a sound exposure level inside the ear canal based on the SPL monitored by the ECM, adjust the audio signal to within a listening sound pressure level range based on the sound exposure level and a personalized hearing level (PHL), and provide the adjusted audio signal to the ECR for delivery to the ear canal, the PHL representing a frequency and loudness level dependent profile of a user which models a dynamic range of the user's hearing, wherein the processor calculates a Sound Pressure Level (SPL) Dose from the sound exposure level and calculates an ear recovery function when the sound exposure level is below an effective quiet level, wherein the SPL Dose decreases below the effective quiet level.
2. The earpiece of claim 1 , further comprising an audio interface operatively coupled to the processor to receive audio content from a media player and deliver the audio content to the processor,
wherein the processor selectively mixes the audio content with the audio signal to produce the adjusted audio signal in accordance with the PHL that permits environmental awareness of the ambient sound.
3. The earpiece of claim 1 , wherein the processor calculates a decay of the SPL Dose from the ear recovery function, reduces the SPL Dose by the decay, and selectively adjusts the audio signal based on the SPL Dose.
4. The earpiece of claim 1 , wherein the processor generates the PHL in accordance with a frequency and loudness level dependent listening test.
5. The earpiece of claim 1 , wherein the processor enhances auditory cues based on the PHL and a spectrum of the ambient sound.
6. The earpiece of claim 1 , wherein the PHL is generated based on at least one of user feedback or an ear sealing level of the earpiece in the ear canal of the user.