This article examines if the voicing of a consonant in Ika has any influence on the acoustic features of a preceding vowel. Ika (ISO 639-3 ikk) has nine vowels and this work centres on them. Nine pairs of words beginning with Ika vowels (the vowels preceding either voiced or voiceless consonants) were produced and analysed using the praat speech software. The acoustic characteristics (duration, fundamental frequency, first formant and second formant) of the initial vowels were investigated. Duration is measured in milliseconds (msec), fundamental frequency (F₀), first formant (F₁) and second formant (F₂) are measured in hertz. The effects of voicing and speaker gender on these characteristics were observed. The results showed that the effects of voicing on the characteristics of the vowels were not statistically significant (p > 0.05). Although vowels preceding voiced consonants generally manifested longer durations and had lower F1 values, the ANOVA test conducted did not show significance at 5% probability. However, there were highly significant differences (p < 0.001) between the female and male speakers in the F₀ and F₁ values, with the female values being higher than the male values. Worthy of note is the result on the characteristics of the vowel /ɪ/ in voiced consonant environments as all the respondents (male and female) had equal values in all the acoustic characteristics analysed. This is an outstanding finding for an under studied language like Ika Igbo.

本文研究了Ika中辅音的发声是否对前一个元音的声学特征有影响。Ika（ISO 639-3 ikk）有九个元音，并且此工作以它们为中心。使用praat语音软件生成并分析了以Ika元音（有声或无声辅音之前的元音）开头的九对单词。研究了初始元音的声学特性（持续时间，基频，第一共振峰和第二共振峰）。持续时间以毫秒（msec），基频（F ₀），第一共振峰（F ₁）和第二共振峰（F _{2）为单位}）以赫兹为单位。观察了发声和说话者性别对这些特征的影响。结果表明，发声对元音特征的影响没有统计学意义（p > 0.05）。尽管发声辅音之前的元音通常表现出较长的持续时间并且具有较低的F1值，但进行的ANOVA测试在5％的概率下没有显示出显着性。但是，在女性说话者和男性说话者之间，F ₀和F ₁之间存在极显着的差异（p <0.001）。值，女性值高于男性值。值得注意的是，在语音辅音环境中，元音/ɪ/的特性得到了结果，因为在分析的所有声学特性中，所有受访者（男性和女性）均具有相等的值。对于像Ika Igbo这样的受过深入研究的语言来说，这是一个了不起的发现。