← Search

Heidi Christensen

11 accepted papers

2025

Early Dementia Detection Using Multiple Spontaneous Speech Prompts: The PROCESS Challenge

ICASSP 2025accepted

Dementia is associated with various cognitive impairments and typically manifests only after significant progression, making intervention at this stage often ineffective. To address this issue, the Prediction and Recognition of Cognitive Decline through Spontaneous Speech (PROCESS) Signal Processing…

Cited by 24SourceScholar
2025

Fairness in Automatic Speech Recognition Isn’t a One-Size-Fits-All

EMNLP 2025

Modern Automatic Speech Recognition (ASR) systems are increasingly deployed in high-stakes settings, including clinical interviews, public services, and educational tools, where equitable performance across speaker groups is essential. While pre-trained speech models like Whisper achieve strong over

Cited by 0SourcePDFScholar
2023

Moving Towards Non-Binary Gender Identification Via Analysis of System Errors in Binary Gender Classification

ICASSP 2023accepted

This paper aims to analyse human perceptions of gender in speech signals, focusing on signals that are misclassified by methods for binary gender classification, looking at the features of speech signals that are more likely to be misclassified, or classified as either nonbinary or unclassifiable. T…

Cited by 0SourceScholar
2022

Multi-Modal Acoustic-Articulatory Feature Fusion For Dysarthric Speech Recognition

ICASSP 2022accepted

Building automatic speech recognition (ASR) systems for speakers with dysarthria is a very challenging task. Although multi-modal ASR has received increasing attention recently, incorporating real articulatory data with acoustic features has not been widely explored in the dysarthric speech communit…

Cited by 0SourceScholar
2021

Multi-Task Estimation of Age and Cognitive Decline from Speech

ICASSP 2021accepted

Speech is a common physiological signal that can be affected by both ageing and cognitive decline. Often the effect can be confounding, as would be the case for people at, e.g., very early stages of cognitive decline due to dementia. Despite this, the automatic predictions of age and cognitive decli…

Cited by 0SourceScholar
2020

Exploring Appropriate Acoustic and Language Modelling Choices for Continuous Dysarthric Speech Recognition

ICASSP 2020accepted

There has been much recent interest in building continuous speech recognition systems for people with severe speech impairments, e.g., dysarthria. However, the datasets that are commonly used are typically designed for tasks other than ASR development, or they contain only isolated words. As such, t…

Cited by 0SourceScholar
2020

Source Domain Data Selection for Improved Transfer Learning Targeting Dysarthric Speech Recognition

ICASSP 2020accepted

This paper presents an improved transfer learning framework applied to robust personalised speech recognition models for speakers with dysarthria. As the baseline of transfer learning, a state-of-the-art CNN-TDNN-F ASR acoustic model trained solely on source domain data is adapted onto the target do…

Cited by 0SourceScholar
2019

Computational Cognitive Assessment: Investigating the Use of an Intelligent Virtual Agent for the Detection of Early Signs of Dementia

ICASSP 2019accepted

The ageing population has caused a marked increased in the number of people with cognitive decline linked with dementia. Thus, current diagnostic services are overstretched, and there is an urgent need for automating parts of the assessment process. In previous work, we demonstrated how a stratifica…

Cited by 0SourceScholar
2019

Phonetic Analysis of Dysarthric Speech Tempo and Applications to Robust Personalised Dysarthric Speech Recognition

ICASSP 2019accepted

Improving the accuracy of personalised speech recognition for speakers with dysarthria is a challenging research field. In this paper, we explore an approach that non-linearly modifies speech tempo to reduce mismatch between typical and atypical speech. Speech tempo analysis at the phonetic level is…

Cited by 0SourceScholar
2017

Multi-view representation learning via gcca for multimodal analysis of Parkinson's disease

ICASSP 2017accepted

Information from different bio-signals such as speech, handwriting, and gait have been used to monitor the state of Parkinson's disease (PD) patients, however, all the multimodal bio-signals may not always be available. We propose a method based on multi-view representation learning via generalized…

Cited by 35SourceScholar
2017

On the impact of non-modal phonation on phonological features

ICASSP 2017accepted

Different modes of vibration of the vocal folds contribute significantly to the voice quality. The neutral mode phonation, often used in a modal voice, is one against which the other modes can be contrastively described, also called non-modal phonations. This paper investigates the impact of non-mod…

Cited by 0SourceScholar