Dataset for: "Disentangling the effects of hearing loss and age on amplitude modulation frequency selectivity"

The dataset contains data for 3 young and 10 older listeners with hearing impairment (young and older HI listeners).<br>The Readme file provides a description of the dataset's content, and of the related article.<br>The data collected were:Population data: age, tested ear, presentation level, and reverse digit span scoreAudiogramsHearing threshold at the test frequencyAmplitude modulation detection thresholdsMasked-threshold patterns (MTPs)<b>Population Data</b><br>Dataset giving the population information for the 13 participants (<i>tp</i>), split into young HI and older HI (<i>group</i>), tested in the study. The data summarizes the participants' <i>age</i><i>,</i> tested ear (<i>ear</i>), and presentation level (<i>level</i>), as well as their Reverse Digit Span score (<i>rds_score</i>). The age is given in years, the presentation level is given in dB Sound Pressure Level (SPL), and the reverse digit span score is given on a normalized scale from 0 to 1.<br><b>Audiogram</b><br>Audiometric thresholds (<i>thresh</i>) were collected for 13 participants (<i>tp</i>), split into young HI and older HI (<i>group</i>), at frequencies (<i>freq</i>) of 0.125, 0.25, 0.5, 1, 2, 3, 4, 6, and 8 kHz. The thresholds are given in dB Hearing Level (HL).<br><b>Hearing Threshold</b><br>Hearing thresholds collected at the test frequency (2.8 kHz) for all listeners.<br>13 participants (<i>tp</i>), split into young HI and older HI (<i>group</i>) were tested. The thresholds (<i>thresh</i>) were measured across at least 3 repetitions (<i>repetition</i>) for each listener. If the standard error across repetitions exceeded 2 dB, additional repetitions were added until that limit was met. The thresholds are given in dB Sound Pressure Level (SPL).<br><b>AM Detection</b><br>Amplitude modulation detection thresholds collected with 13 participants (<i>tp</i>), split into young HI and older HI (<i>group</i>). Detection thresholds (<i>thresh</i>) were collected at four different target modulation frequencies (<i>fmod</i>) of 4, 16, 64, and 128 Hz. At least three repetitions (<i>repetition</i>) were collected for each condition. If the standard error across repetitions exceeded 2 dB, additional repetitions were added until that limit was met. The thresholds are given for the target modulation depth on a dB scale: M = 20log₁₀(m), where m is the modulation depth on a linear scale.<br><b>Masked-Threshold Patterns (MTPs)</b><br>Masked-threshold patterns (MTPs), collected with 13 participants (<i>tp</i>), split into young HI and older HI (<i>group</i>). Masked thresholds (<i>thresh</i>) were collected at four different target modulation frequencies (<i>fmod</i>) of 4, 16, 64, and 128 Hz, and five to seven different masker-modulation center frequencies (given as octaves relative to the target modulation frequency, <i>mask_oct</i>) at -5, -4, -2, -4/3, -2/3, 0, +2/3, +4/3, and +2 octaves. At least three repetitions (<i>repetition</i>) were collected for each condition. If the standard error across repetitions exceeded 2 dB, additional repetitions were added until that limit was met. In case a threshold was not obtainable in one of the repetitions, the <i>thresh</i> entry specifies "NaN". The thresholds are given for the target modulation depth on a dB scale: M = 20log₁₀(m), where m is the modulation depth on a linear scale.<br>Masked thresholds for TP07 could not be obtained for the 4-Hz target modulation frequency and masker modulations of +2/3 and +4/3 octaves. Hence, the 4-Hz MTP for TP07 was considered uncomplete and discarded.<br><b><i>Ethical statement</i></b><br>All listeners were financially compensated for their time and gave written informed consent. Ethical approval for the study was provided by the Science-Ethics Committee for the Capital Region of Denmark (reference H-16036391).<br><b><i>Acknowledgments</i></b><br>The authors thank Borgný Súsonnudóttir Hansen for her contribution to the data collection, as well as Erik Kjærbøl and Jesper Borchorst Yde for their precious help in recruiting young participants with hearing impairment. The authors also thank Jens Hjortkjær and Jonatan Märcher-Rørsted for kindly providing their implementations of the reverse digit span test and of the Cambridge formula (CamEq).

本数据集涵盖了3名青年听障（Hearing Impairment, HI）听众与10名老年听障听众的相关数据。本数据集的内容以及相关研究论文的说明均已在自述文件（Readme file）中给出。
本次采集的数据包括：人口统计学数据、听力图、测试频率下的听阈、幅度调制检测阈值以及掩蔽听阈模式（Masked-threshold patterns, MTPs）。

<b>人口统计学数据</b>
本部分包含本研究中13名受试参与者（<i>tp</i>）的人口信息，按青年HI组与老年HI组（<i>group</i>）进行分组。数据涵盖了参与者的<i>age</i>（年龄，单位为年）、<i>ear</i>（受试耳）、<i>level</i>（刺激呈现声级，单位为分贝声压级，dB Sound Pressure Level, SPL）以及<i>rds_score</i>（反向数字广度得分，归一化至0至1的量表）。

<b>听力图（Audiogram）</b>
本研究为13名受试参与者（<i>tp</i>）、按青年HI组与老年HI组（<i>group</i>）分组，在0.125、0.25、0.5、1、2、3、4、6与8 kHz的频率下采集了<i>thresh</i>（听阈）数据，听阈单位为分贝听力级（dB Hearing Level, HL）。

<b>听阈</b>
本部分为所有听众在测试频率2.8 kHz下采集的听阈数据。本次测试共纳入13名受试参与者（<i>tp</i>），按青年HI组与老年HI组（<i>group</i>）分组。每位听众的<i>thresh</i>（听阈）至少重复测量3次（<i>repetition</i>）；若重复测量间的标准误超过2 dB，则需补充测量直至满足该误差限制。听阈单位为分贝声压级（SPL）。

<b>幅度调制检测</b>
本部分为13名受试参与者（<i>tp</i>）、按青年HI组与老年HI组（<i>group</i>）分组的幅度调制检测阈值数据。检测阈值（<i>thresh</i>）在4、16、64与128 Hz共4种目标调制频率（<i>fmod</i>）下采集，每种条件下至少重复测量3次（<i>repetition</i>）；若重复测量间的标准误超过2 dB，则需补充测量直至满足该误差限制。本次阈值以分贝尺度的目标调制深度M表示，计算公式为M = 20log₁₀(m)，其中m为线性尺度下的调制深度。

<b>掩蔽听阈模式（Masked-threshold patterns, MTPs）</b>
本部分为13名受试参与者（<i>tp</i>）、按青年HI组与老年HI组（<i>group</i>）分组的掩蔽听阈模式数据。掩蔽听阈（<i>thresh</i>）在4、16、64与128 Hz共4种目标调制频率（<i>fmod</i>）下采集，同时针对相对于目标调制频率的掩蔽调制中心频率（以倍频程表示，<i>mask_oct</i>），设置了-5、-4、-2、-4/3、-2/3、0、+2/3、+4/3与+2倍频程共5至7种不同参数；每种条件下至少重复测量3次（<i>repetition</i>），若重复测量间的标准误超过2 dB，则需补充测量直至满足该误差限制。若某次重复测量中无法获得听阈，则<i>thresh</i>字段将标注为"NaN"。本次阈值以分贝尺度的目标调制深度M表示，计算公式为M = 20log₁₀(m)，其中m为线性尺度下的调制深度。

受试参与者TP07在4 Hz目标调制频率以及+2/3、+4/3倍频程掩蔽调制条件下无法获得掩蔽听阈，因此其4 Hz的掩蔽听阈模式被视为不完整并予以剔除。

<b>伦理声明</b>
所有参与听众均已获得相应的时间报酬，并签署了书面知情同意书。本研究的伦理审批由丹麦首都地区科学伦理委员会（Science-Ethics Committee for the Capital Region of Denmark）批准，审批编号为H-16036391。

<b>致谢</b>
作者感谢Borgný Súsonnudóttir Hansen在数据采集过程中提供的协助，同时感谢Erik Kjærbøl与Jesper Borchorst Yde在招募青年听障参与者时提供的宝贵帮助。此外，作者还感谢Jens Hjortkjær与Jonatan Märcher-Rørsted慷慨提供了反向数字广度测试以及剑桥公式（Cambridge formula, CamEq）的实现代码。