A quantitative analysis of behavioral selectivity for pulse rise-time in the gray treefrog, Hyla versicolor
A quantitative analysis of behavioral selectivity for pulse rise-time in the gray treefrog, Hyla versicolor
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DOI：
10.1007/s003590050363
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发表时间：
1999-07-01
期刊：
影响因子：
--
通讯作者：
Schul, J
中科院分区：
文献类型：
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作者：
Gerhardt, HC;Schul, J
在选择情况下测试了女性趋音反应对合成广告呼叫的选择性。基于合成脉冲线性上升时间差异的偏好取决于强度和载波频率。当载波频率为 1.1 kHz（模拟广告呼叫中的低频峰值）时，女性更喜欢上升时间脉冲较慢的替代方案，在 75 dB SPL 及更高的播放电平下，脉冲上升时间相差 5 毫秒。在 65 dB SPL 时可识别出 10 ms 的上升时间差异。当载波频率为 2.2 kHz 时，模拟通话中的高频峰值，女性仅在 85 dB SPL 时辨别出 5 毫秒的上升时间差异。当播放水平较低时，差异为 10 毫秒时，女性没有表现出偏好。用于区分两个载波频率处的上升时间差异的阈值差异（大约15-20dB）大于这两个频率的行为阈值差异（大约10dB）。这一结果表明，上升时间辨别可以仅由主要调谐到呼叫中低频峰值的神经通道介导。雌性可能通过比较每次呼叫的前几个脉冲而不是对整个呼叫进行平均来评估上升时间的差异。
The selectivity of female phonotactic responses to synthetic advertisement calls was tested in choice situations. Preferences based on differences in the linear rise-time of synthetic pulses depended on intensity and carrier frequency. When the carrier frequency was 1.1 kHz, simulating the low-frequency peak in the advertisement call, females preferred alternatives with slower rise-time pulses that differed by 5 ms at playback levels of 75 dB SPL and higher. A rise-time difference of 10 ms was discriminated at 65 dB SPL. When the carrier frequency was 2.2 kHz, simulating the high-frequency peak in the call, females discriminated a 5-ms difference in rise-time only at 85 dB SPL. Females showed no preference when the difference was 10 ms at lower playback levels. The difference in the thresholds (about 15-20 dB) for discriminating differences in rise-time at the two carrier frequencies was greater than the difference in behavioral thresholds for these two frequencies (about 10 dB). This result suggests that rise-time discrimination can be mediated solely by the neural channel mainly tuned to the low-frequency peak in the call. Females probably assess differences in rise-time by comparing the first few pulses of each call rather than by averaging over the entire call.