Discussing to what extent a person can selectively attend to or ignore a particular stimulus, the examples used below tap into extremes intentionally. It is from extremes we work towards determining not if stimuli can be or are routinely ignored, but when, under what conditions.
1. The need for the term “hypnosis” to be in any study in order for it to be applicable.
A person enters a forum and asks if a .357 magnum can penetrate 7 inches of steel. A gun expert with decades of experience says it is possible. A physicist posts several studies that demonstrate it is not possible. The gun expert challenges the physicist by asking the physicist how many guns they have ever fired in their life and by asking why the word gun or bullet is not mentioned in any of the studies.
I am an educational psychologist. The studies I posted neither require that I be a hypnotist or mention the word “hypnosis” in order to respond to the OP by demonstrating how selective attention works.
2. The idea if a study hasn’t been conducted a conclusion cannot be drawn.
Could hypnosis give super powers?
I take the highly suggestible participants in the hypnosis pain studies. I have a post-hypnotic expert work with me to place them in a deep trance. I then take a sledge hammer and break a foot or a knee. I don’t need to conduct a study with the word “hypnosis” to draw the conclusion that the subjects will not be able to ignore the pain. Why? Why don’t I need to conduct such studies?
See point #1. Conclusions can be drawn from other bodies of knowledge that demonstrate why it is not necessary to test the ability of hypnosis to potentially provide the super power of ignoring a sledge hammer to the foot.
3. The hypnosis pain studies.
First, there have been studies on pain with both animals and humans. During and just prior to WWII there were lots of studies forming ‘Gestalt psychology’ as well as some Eastern lines of research that experimented on subjugated populations. One study tied live prisoners to stakes and tested various grenades for lethality. To my knowledge they never hypnotized anyone to demonstrate that subjects in trance were able to ignore the explosion or subsequent shrapnel tearing through the body.
Second, I am familiar with the studies you posted. It is terrific, solid work that shows the benefits and limitations of hypnosis. I’m a big fan of the study you posted along with similar studies. I’ve read quite a few studies on the use of hypnosis in dental practices. I’m not as fond of, but understand the value of publishing ‘case studies’ that demonstrate the isolated narratives of hypnoanesthesia.
The reason there is no need to design a specific experiment that uses the word hypnosis regarding the OP’s experience, is because we can rely on hypnosis studies similar to the one you provided as well as other bodies of knowledge to draw conclusions regarding the limits of being able to ignore multiple random noises of varying intensities.
Note, cognitive load theory does support reaching a mental state where all other stimuli are ignored, hence the concepts of “tunnel vision” or the “cocktail party” phenomena. Human factors researchers use these concepts to design ways to navigate these issues, e.g. warning lights or alarms in airplane cockpits. What is not supported is using multiple random stimuli of varying intensities to intentionally achieve focus, i.e. the question posted by the OP regarding their culpability in not being able to focus. There was no way to predict what noise was next, in what order, or what intensity.