2022-04-12 Callimanis Presentation 8 Sheila Warren to PC PHFrom: Alena Callimanis <acallimanis@gmail.com>
Sent: Tuesday, April 12, 2022 10:06 AM
To: Tania Flores; Cheri Flores
Cc: Sheila Warren
Subject: Presentation 8 - Sheila Warren - April 12 2022 Planning Commission Meeting
Attachments: Shiela Warren 2 April 12 2022 Noise implications.pdf
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Please find attached the presentation that Sheila Warren is doing for the Planning Commission April 12
2022 meeting. Sheila has not presented before. It is presentation number 8.
Thank you for your help.
Alena Callimanis
LQRRD
919 606-6164
The Implications of not Using the Correct
Noise Study at Coral Mountain
Sheila Warren
La Quinta Resident
The Implications of the Noise Measurement
• dBA measurement was used in the EIR.
• dBC with the engine and machinery noise was not measured in the
EIR and is critical because the wave machine will be used for 15 hours
per day, 365 days a year
• Low frequency noise (LFN) is to the noise world what the marathon
runner is to athletics; it has long wavelengths (31.5 Hz, for example, is
almost 35 feet long), high endurance, and will travel long distances.
Implications of Low Frequency Noises
• In many ways, this makes Low Frequency Noise even more important
to address. The vibration of Low Frequency Noise can get into nearby
houses as the sound wave itself develops through the enclosure
• It will have an adverse effect on the residents. For a community in
close proximity, Low Frequency Noise can pose a detrimental health
risk while also increasing the likelihood of community complaints.
• Health implications include headaches, unusual tiredness, lack of
concentration, irritation, and pressure on the eardrum
What are the Health Implications of Low Frequency Noise
• Low Frequency Noise is known to produce a number of negative
physiological reactions:
• Changes to blood pressure and heart rate, headaches, vertigo, sleep disturbance,
difficulty breathing, anxiety
• Low Frequency Noise is known to produce a number of subjective
complaints
• For example feelings of vibration, pressure, and annoyance, as well as mental and
physical performance impairment (e.g., fatigue, irritability, lack of concentration)
• Low Frequency Noise has even been found to physiologically affect both
hearing and deaf participants in studies comparing the two,
demonstrating that it is the cochlear stimulation of LFN that adversely
affects those exposed to it in a manner unique from high frequency noise
Echo Test
• How will you treat the Mountain — soft as one engineer described it in
the EIR, or as a hard surface like was used in modeling a highway wall
for transportation noise dBA in the EIR
• Was a large structure to mimic Coral Mountain even put in place in
the Cadna/A software, to study possible refractions off the mountain?
• This was a software modeling study superimposing measurements
at Coral Mountain receptors with sound recorded at Lemoore
• No actual sound test was performed at the Mountain.
• We need that studied.
• By the way, a colleague did a "hello, hello" at the site of the light
demo closest to the Mountain and heard an echo.
My colleague will give you more details and the
corresponding implications of dBA versus dBC in
his presentation over Zoom