Special amplitude-frequency effects in VHF quartz resonators

Differences in real ear sound pressure levels (SPLs) with three portable stereo system (PSS) earphones (supraaural [Sony Model MDR-44], semiaural [Sony Model MDR-A15L], and insert [Sony Model MDR-E225]) were investigated. Twelve adult men served as subjects. Frequency response, high frequency average (HFA) output, peak output, peak output frequency, and overall RMS output for each PSS earphone were obtained with a probe tube microphone system (Fonix 6500 Hearing Aid Test System). Results indicated a significant difference in mean RMS outputs with nonsignificant differences in mean HFA outputs, peak outputs, and peak output frequencies among PSS earphones. Differences in mean overall RMS outputs were attributed to differences in low-frequency effects that were observed among the frequency responses of the three PSS earphones. It is suggested that one cannot assume equivalent real ear SPLs, with equivalent inputs, among different styles of PSS earphones.

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Experience Matters

Zeitschrift für Psychologie ◽

10.1027/2151-2604/a000423 ◽

2020 ◽

Vol 228 (4) ◽

pp. 254-263 ◽

Cited By ~ 1

Author(s):

Pedro S. Mendes ◽

Karlos Luna ◽

Pedro B. Albuquerque

Keyword(s):

Word Frequency ◽

High Frequency ◽

Recall Test ◽

Judgments Of Learning ◽

Direct Experience ◽

Frequency Effects ◽

Actual Frequency ◽

Actual Word ◽

High Frequency Words

Abstract. The present study tested if word frequency effects on judgments of learning (JOLs) are exclusively due to beliefs or if the direct experience with the items also plays a role. Across four experiments, participants read prompts about the frequency of the words (high/low), which could be congruent/incongruent with the words’ actual frequency. They made pre-study JOLs (except Experiment 1b), immediate JOLs, and completed a recall test. If experience drives the effect, JOLs should be based on actual word frequency rather than the prompts. Results showed higher pre-study JOLs for prompts of high frequency, but higher immediate JOLs for high-frequency words regardless of the prompt, suggesting an effect of direct experience with the words. In Experiments 2 and 3, we manipulated participants’ beliefs, finding a small effect of beliefs on JOLs. We conclude that, regarding word frequency, direct experience with the items seems more relevant than beliefs when making immediate JOLs.

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