Re: [AUDITORY] Natural experiment example needed

Subject: Re: [AUDITORY] Natural experiment example needed

From: Harvey Abrams <hbabrams@xxxxxxxxx>

Date: Sat, 5 Apr 2025 08:27:04 -0400

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Comments: To: Wolfgang Ellermeier <ellermeier@xxxxxxxxxxxxxxxxxxxxxxxxxxx>

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Reply-to: Harvey Abrams <hbabrams@xxxxxxxxx>

Sender: AUDITORY - Research in Auditory Perception <AUDITORY@xxxxxxxxxxxxxxx>

Wonderful question, Wolfgang. The communication challenges imposed by wearing face masks may provide some useful lessons on the effects of low-pass filtering and the importance of visual cues on speech intelligibility. There are some good papers on this topic; for example,

Kim, Y., & Thompson, A. (2022). An Acoustic-Phonetic Approach to Effects of Face Masks on Speech Intelligibility. Journal of speech, language, and hearing research : JSLHR, 65(12), 4679–4689. https://doi.org/10.1044/2022_JSLHR-22-00245

Alkharabsheh, A., Aboudi, O., Abdulbaqi, K., & Garadat, S. (2023). The effect of wearing face mask on speech intelligibility in listeners with sensorineural hearing loss and normal hearing sensitivity. International journal of audiology, 62(4), 328–333. https://doi.org/10.1080/14992027.2022.2045366

-Harvey

On Sat, Apr 5, 2025 at 3:22 AM Wolfgang Ellermeier <ellermeier@xxxxxxxxxxxxxxxxxxxxxxxxxxx> wrote:

Here's my favourite record of a 'natural experiment' (Derryberry et al., Science 2020) due to the changes in the acoustical environment produced by COVID (air) traffic measures. I have occasionally used it in teaching:

https://www.science.org/doi/10.1126/science.abd5777

Californian songbirds adapting the acoustics of their songs (level, spectrum, complexity) to the dramatically changed soundscapes!

Wolfgang

Am 04.04.2025 um 19:23 schrieb Huron, David:

In teaching research methods to music-psychology students, for years I have illustrated a "natural experiment" by discussing how shutting down air traffic in the aftermath of 9/11 allowed climate scientists to determine the effect of aircraft vapor trails on earth's overall temperature. (Do vapor trails cool the earth by blocking sunlight, or is the net effect to warm the earth by blocking reflected surface heat from radiating into space?)

I'd like to have an updated example, preferably something we learned about music or hearing arising from Covid isolation -- something students could better relate to.

Any suggestions?

Cheers,

David Huron

--
Prof. Wolfgang Ellermeier, Ph.D.
Institut fuer Psychologie
Technische Universitaet Darmstadt
Alexanderstr. 10
D - 64283 DARMSTADT, Germany

phone: ++49-6151-1624103
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