Abstract: Diagnosing the perception of missing fundamental illusion is provided. The method comprises generating a first tone comprising a sinusoidal sum of harmonic multiples of a first fundamental frequency. The first tone does not include the first fundamental frequency. A second tone is generated comprising a sinusoidal sum of a second fundamental frequency with a number of harmonics multiples of the second fundamental frequency. The second fundamental frequency is sufficiently higher than the first fundamental frequency to be distinguished as a different pitch by a user. The harmonic multiples of the first fundamental frequency and second fundamental frequency are the same multiples. The first tone and second tone are presented to a user in a predetermined sequence unknown to the user. An answer input is received from the user regarding which of the first tone or second tone is higher. The user is diagnosed according to the answer input.

Abstract: Methods and systems for assisting tonally-challenged singers. A microphone can be integrated with a sound reinforcement system used in a live performance. The microphone, which can transduce the performer's voice, can serve multiple purposes such as, for example, to feed input to the natural ear and to the sound reinforcement system. The processed sound of the performer's voice (with fundamental frequency emphasized) can be mixed into the signal fed to a stage “monitor” speaker facing the performer or a headset worn by the performer.

Abstract: A method for assisting recognition of intonation of speech is provided. The method comprises detecting voice an utterance by a hearing aid and generating a raw voice signal produced by the voice utterance. The hearing aid processes the raw voice signal to generate an intelligibility signal that boosts and equalizes frequencies related to intelligibility of phonemes of the voice utterance. The hearing aid processes the raw voice signal to generate an intonation signal that isolates the fundamental frequency related to intonation of the voice utterances. The hearing aid mixes the intelligibility signal and the intonation signal to generate and output an intelligible speech signal with a boosted fundamental frequency.

Abstract: Methods and systems for assisting tonally-challenged singers. A microphone can be integrated with a sound reinforcement system used in a live performance. The microphone, which can transduce the performer's voice, can serve multiple purposes such as, for example, to feed input to the natural ear and to the sound reinforcement system. The processed sound of the performer's voice (with fundamental frequency emphasized) can be mixed into the signal fed to a stage “monitor” speaker facing the performer or a headset worn by the performer.

Abstract: Methods and systems for assisting tonally-challenged singers. A microphone can be integrated with a sound reinforcement system used in a live performance. The microphone, which can transduce the performer's voice, can serve multiple purposes such as, for example, to feed input to the natural ear and to the sound reinforcement system. The processed sound of the performer's voice (with fundamental frequencies emphasized) can be mixed into the signal fed to a stage “monitor” speaker facing the performer or a headset worn by the performer.

Abstract: An apparatus to accentuate a fundamental frequency of a singer's utterance. The apparatus includes a frequency discriminator configured to detect the fundamental frequency of the singer's utterance. The apparatus also includes a device configured to process the singer's utterance, the device comprising at least one of: a filter connected to the frequency discriminator and configured to isolate the fundamental frequency; or a synthesizer connected to the filter and configured to isolate the fundamental frequency. The apparatus also includes a speaker configured to emit an audio signal that effectively reproduces and accentuates the fundamental frequency back to the singer.

Abstract: A vocal feedback device comprising: a microphone; a fundamental frequency accentuator electrically connected to the microphone, a delay circuit electrically connected to the fundamental frequency accentuator, and a speaker electrically connected to the delay circuit. The device configured to convert vocal utterances received at the microphone into an electrical signal, impose a time delay before transmitting the electrical signal, after the time delay, transmit the electrical signal to the speaker, and convert the electrical signal to an audio signal using the speaker, the audio signal being a replication of the vocal utterances.

Abstract: A vocal feedback device comprising: a microphone; a fundamental frequency accentuator electrically connected to the microphone, a delay circuit electrically connected to the fundamental frequency accentuator, and a speaker electrically connected to the delay circuit. The device configured to convert vocal utterances received at the microphone into an electrical signal, impose a time delay before transmitting the electrical signal, after the time delay, transmit the electrical signal to the speaker, and convert the electrical signal to an audio signal using the speaker, the audio signal being a replication of the vocal utterances.

Abstract: An apparatus to accentuate a fundamental frequency of a singer's utterance. The apparatus includes a frequency discriminator configured to detect the fundamental frequency of the singer's utterance. The apparatus also includes a device configured to process the singer's utterance, the device comprising at least one of: a filter connected to the frequency discriminator and configured to isolate the fundamental frequency; or a synthesizer connected to the filter and configured to isolate the fundamental frequency. The apparatus also includes a speaker configured to emit an audio signal that effectively reproduces and accentuates the fundamental frequency back to the singer.

Abstract: A method and apparatus to facilitate tone challenged singers to sing intended notes. In one aspect, the singer determines a note to sing corresponding to an intended frequency fi. The singer utters a note continuously with fundamental frequency fu into a microphone of the natural ear apparatus. The note is processed by the apparatus to produce sound emphasizing the fundamental frequency fu and output through a speaker to the auditory organs of the singer. The singer detects differences between intended frequency fi and uttered fundamental frequency fu. The singer adjusts his vocal organs as he utters the note with the intention of changing fu to reduce difference between fi and fu.

Abstract: Methods and systems for assisting tonally-challenged singers. A microphone can be integrated with a sound reinforcement system used in a live performance. The microphone, which can transduce the performers voice, can serve multiple purposes such as, for example, to feed input to the natural ear and to the sound reinforcement system. The processed sound of the performers voice (with fundamental frequencies emphasized) can be mixed into the signal fed to a stage “monitor” speaker facing the performer or a headset worn by the performer.

Abstract: A method and apparatus to facilitate tone challenged singers to sing intended notes. In one aspect, the singer determines a note to sing corresponding to an intended frequency fi. The singer utters a note continuously with fundamental frequency fu into a microphone of the natural ear apparatus. The note is processed by the apparatus to produce sound emphasizing the fundamental frequency fu and output through a speaker to the auditory organs of the singer. The singer detects differences between intended frequency fi and uttered fundamental frequency fu. The singer adjusts his vocal organs as he utters the note with the intention of changing fu to reduce difference between fi and fu.