Understanding the Cocktail Party Effect
The cocktail-party effect refers to the ability to focus one’s attention on a particular stimulus while filtering out a range of other stimuli (i.e., noise). It is the ability to focus one's auditory attention on a particular stimulus while filtering out a range of other stimuli, much like when a person can focus on a single conversation in a noisy room.
Related Terms
- Auditory Attention: Auditory attention refers to how we selectively process specific sounds while ignoring others. It's what allows us to concentrate on one voice among many in a crowded place.
- Echoic Memory: Echoic memory is sensory memory related to auditory information coming from the ears.
As we head into the holiday season, many of us will attend remembrance celebrations of the year’s transpiration, and resolutions for the year to come. Civilizations around the world have been celebrating the new year for at least four millennia, but not always in December. Although this year’s gatherings may be a bit smaller than usual, common NYE traditions include attending parties, making resolutions, toasting with champagne, singing “Auld Lang Syne,” and enjoying food. The pop of the champagne cork, toasting to the new year, singing songs, catching up with friends, and making resolutions result in a less than accommodating listening environment known as the “cocktail-party” effect.
Research and Studies
In a recent study, Reiss and Molis (2021) used dichotic vowel stimuli varying in fundamental frequency to explore the presence of speech fusion (i.e., blending of stimuli between the two ears) in groups of listeners with normal hearing or hearing loss. Most participants across both groups reported hearing only one vowel (i.e., fused the vowels) when the dichotic stimuli did not differ in fundamental frequency. When vowel fundamental frequency increased between ears, listeners with normal-hearing sensitivity indicated the presence of two vowels, while listeners with hearing loss continued report only one vowel.
The following table summarizes the findings of the Reiss and Molis (2021) study:
| Condition | Normal Hearing | Hearing Loss |
|---|---|---|
| Dichotic stimuli with no difference in fundamental frequency | Heard one vowel (fused) | Heard one vowel (fused) |
| Dichotic stimuli with increased vowel fundamental frequency | Heard two vowels | Heard one vowel |
References
- Cherry EC. (1953) Some experiments on the recognition of speech, with one and with two ears.
- Reiss LAJ, Molis MR. (2021) An alternative explanation for difficulties with speech in background talkers: Abnormal fusion of vowels across fundamental frequency and ears. J Assoc Res Otolaryngol 22(4):443-461. doi: 10.1007/s10162-021-00790-7. Epub 2021 Apr 20. Erratum in: J Assoc Res Otolaryngol.
- Reiss LA, Shayman CS, Walker EP, et al. (2017) Binaural pitch fusion: Comparison of normal-hearing and hearing-impaired listeners. J Acoust Soc Am 141(3):1909. doi: 10.1121/1.4978009.