• Yacker Tracker Noise Level Monitor Detector - Visual LED Traffic Signal Light - Great for Schools, Classrooms, Cafeterias, Hospitals and More - 17"

    The Yacker Tracker appears to be a traffic signal, but actually signals too much noise. Just select the appropriate level of noise for any given situation and let the Yacker Tracker be a visual and audio reminder when the noise level gets too high! Aim: To provide a visual signal of too much noise for children and students of all age levels. 17"H x 5 1/2"W x 5"D. Sold as Single Unit. You can set the level with which you are comfortable. Visual signal of when it is too loud. Great for classrooms, cafeterias and much more. Works with students of all ages.

    • Color: Red, Yellow, Green
    • Brand: Yacker Tracker
    • ASIN: B001AZ2O2Q
    • UPC: 832382007540

  • Engineering Noise Control

    This classic and authoritative student textbook contains information that is not over simplified and can be used to solve the real world problems encountered by noise and vibration consultants as well as the more straightforward ones handled by engineers and occupational hygienists in industry. The book covers the fundamentals of acoustics, theoretical concepts and practical application of current noise control technology. It aims to be as comprehensive as possible while still covering important concepts in sufficient detail to engender a deep understanding of the foundations upon which noise control technology is built. Topics which are extensively developed or overhauled from the fourth edition include sound propagation outdoors, amplitude modulation, hearing protection, frequency analysis, muffling devices (including 4-pole analysis and self noise), sound transmission through partitions, finite element analysis, statistical energy analysis and transportation noise. For those who are already well versed in the art and science of noise control, the book will provide an extremely useful reference. A wide range of example problems that are linked to noise control practice are available on www.causalsystems.com for free download.

    • ASIN: 1498724051

  • Engineering Noise Control: Theory and Practice, Fourth Edition

    The practice of engineering noise control demands a solid understanding of the fundamentals of acoustics, the practical application of current noise control technology and the underlying theoretical concepts. This fully revised and updated fourth edition provides a comprehensive explanation of these key areas clearly, yet without oversimplification. Written by experts in their field, the practical focus echoes advances in the discipline, reflected in the fourth edition’s new material, including: completely updated coverage of sound transmission loss, mufflers and exhaust stack directivity a new chapter on practical numerical acoustics thorough explanation of the latest instruments for measurements and analysis. Essential reading for advanced students or those already well versed in the art and science of noise control, this distinctive text can be used to solve real world problems encountered by noise and vibration consultants as well as engineers and occupational hygienists.

    • Brand: imusti
    • ASIN: 0415487072

  • Jies Wired Earphones In Ear Headphones Noise Cancelling Earbuds Bass Stereo Headsets With Microphone & Volume Control & Remote For iPhone Android iPod iPad Mp3 Tablet Laptop (Gold)

    Isolate noise These sound isolating earbuds can block out 90% ambient noise. You can easily enjoy your music anytime anywhere with these noise isolating earbuds, even at noisy streets. They help stop disturbance from the outside when you are doing yoga, reading, thinking and relaxing. Just stay in your private world. Stay secure in ears while working out In ear design ensure JIES metal headphones will not become loose and fall out of ears. Great sports headphones for running, fitness walking, jogging, gym, Exercise, dancing and hiking. They are also sweatproof headphones. Let you enjoy exercise and will not have to worry about your exercise earbuds coming off even during intense workouts. Decent sound and bass High quality audio signal transmission ensure outstanding Hifi performance. The sound comes out is loud and clear. Strong bass stereo makes the beats more energetic and activate you in sport. Start to enjoy live concert-like music with these stereo in ear headphones! headphones for iPod, iPhone, Mp3 Player, iPad, and android Smartphones tablet. One year quality warranty If there are any quality issues, we'll give you a total refund or a replacement, at no cost without questions asked. We just want your 100% satisfaction

    • Color: Gold
    • Brand: Jies
    • ASIN: B07CP5L3TG
    • UPC: 667581558506

  • Handbook of Acoustical Measurements and Noise Control

    HANDBOOK OF ACOUSTICAL MEASUREMENTS AND NOISE CONTROL, THIRD EDITION. Cyril M. Harris. Comprehensive coverage of noise control and measuring ins-truments containing over 50 chapters written by top experts in the field. 1024 pp, hardcover 1998 (original published 1991).

    • Brand: American Packing & Gasket
    • ASIN: 156396774X

  • Wired Earphones Aoslen In Ear Headphones Noise Cancelling Earbuds Bass Stereo Sports Headsets with Microphone & Button Control & Volume Control For iPhone Android Etc - Silver

    Aoslen's Stereo In-ear Earphones Premium Sound Quality The balance between clear, clean treble and deep bass delivers a rich audio experience for all music genres. Built-in microphone and Remote Answer | End Call | Reject Call | Switch Songs | Activate Siri | Volume +/- One click: Start/Stop the music. Two clicks: Next song. Three clicks: Previous song. Long press: Decline call/Start Siri. Short press: Answer call. Press +: Volume up. Press -: Volume down. Isolate noise These sound isolating earphones can block out 90% ambient noise. You can easily enjoy your music anytime anywhere with these noise isolating earbuds, even at noisy streets. They help stop disturbance from the outside when you are doing yoga, reading, thinking and relaxing. Just stay in your private world. Comfortable fit Comfortable and secure fit make sure the headset stays put when you are out running, jogging or exercising. Makes you feel comfortable all day during using, and even without feeling it. Wide Compatibility Our In-ear headphones works for iPhones, iPods, MP3 Players, universal Android smartphones, tablets and other devices equipped with 3.5mm headphone jack. Box Contents: Aoslen earphones x 1 Instruction Manual x 1 Silicone earbuds x 3 (S/M/L) Cord clip x 1 Aoslen is always here for you. You...

    • Color: sliver
    • Brand: Aoslen
    • ASIN: B07DJ4CD2H
    • UPC: 842495250542

  • Deluxe Yacker Tracker with Remote Control by AGI - Attention Getters, Inc

    All the fantastic features of the original Yacker Tracker plus a remote control and adjustable siren volume. The green light stays lit as long as classroom noise stays below your chosen level. When students start to get too loud, a flashing yellow light warns them to quiet down. If noise reaches 15 decibels above the setting you've chosen, the red light goes on and a siren sounds. Siren volume can be adjusted or turned off and desired decibel level may be set from 50 to 110. The new remote allows teachers to adjust volume control, dB setting, siren on/off and power switch. Remote has 30-foot range within 30 degrees of the infrared sensor on the main unit. Sold as Single Unit. Great for classroom management. You set the decibel level and the siren volume. Includes a remote control to adjust volume or turn off the siren. Created by experts to help manage excessive noise.

    • Color: silver
    • Brand: Yacker Tracker
    • ASIN: B000GW032C
    • UPC: 799198339381

  • Sleep Therapy Sound Machine by Silverflye- Portable Spa Relaxation for Baby, Adult and Travelers- Soothing White Noise with 6 Nature Sounds for Home, Office or Travel- Remote and USB Cord Included

    Babies have what are called "Sleep Arousals" These occur about every 20-45 minutes. Ever wonder why your baby naps for sometimes only 20 minutes at a time? When they hit their sleep arousal at the 20 minute mark they are unable to fall back into deeper sleep and thus nap time is over. Silverflye's White Noise Machine helps babies gently navigate these arousals to get longer, more restorative naps. This revolutionary sleep aid machine helps to block out the noise of everyday life These include TV, Siblings, Doorbells, etc. that can interfere with day naps and night sleep. NEW Intuitive Remote Control You no longer have to crawl into your baby's room salamander style to restart or shut off the sound machine! This sound machine comes with the only Remote Control on the market and has a 25 foot range. It controls and operates all of its dynamic functions. Great Sleep Associations White noise sound machines are great sleep associations for babies. This product will create a consistent sleep signal to establish a good sleep schedule for your baby wherever you go. Use this to create a safe space by blocking out stimulation anywhere, as it calms and distresses babies, even those with colic. MUST Have When Expecting Give yourself or an expectant mom the most precious and appreciated ba...

    • Color: White
    • Brand: Silverflye
    • ASIN: B01E4ZKR86
    • UPC: 646437167239

  • SODIAL(R) Microphone Noise Decibel Sound Sensor Measurement Module 3p / 4p Interface for Arduino

    * SODIAL is a registered trademark. ONLY Authorized seller of SODIAL can sell under SODIAL listings.Our products will enhance your experience to unparalleled inspiration. SODIAL(R) Microphone Noise Decibel Sound Sensor Measurement Module 3p / 4p Interface for ArduinoNet Weight(kg) : 0.003Voltage: 5Vcolor:blue Material:MetalInterface: 3PIN/4PINPackage Included: 1 X Microphone sensor Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.

    • Color: blue
    • Brand: SODIAL(R)
    • ASIN: B075L9S523
    • UPC: 192090081578

  • Wohome Active Noise Cancelling Headphones Bluetooth Wireless Over-ear Stereo Headphone with Mic and Volume Control

    Wohome headphones featuring latest active noise canceling technology can reduce 95% outside noise especially for mid/low pitched sounds when you are in airplane, gym, train, metro, travel or other noisy environments, give you a pure listening experience, what's more, which use the high-quality Bluetooth chipset and drivers,output impactful bass, extended treble and higher fidelity, true stereo headphones,a good gift for your families and friend! -Bluetooth solution: CSR -Bluetooth version: V4.1 -Support agreement: A2DP, AVRCP, HFP, HSP -Operating distance: 10m/30feet -Battery: 500mAh -Charging time: about 2.5 hours -Charging current:200ma -Music playing time: up to 20 hours(50% volume, noise canceling off) -Active noise canceling working time: about 16 hours -Driver Unit: Ø40mm -Sensitivity:105dB/1mW(S.P.L at 1KHz) -Impedance:32Ω -Frequency Range:20Hz-20KHz -Rated Power:10mw -Max.Power:20mw -ANC solution: max -Noise reduction performance: up to 20db Package including: 1x Headphones 1x USB cable 1x User manual 1x Audio cable

    • Color: Active Noise Cancelling Headphones Bluetooth--BLACK
    • Brand: Wohome
    • ASIN: B07CHFZXTW
    • UPC: 667797560102

  • Noise Control: From Concept to Application

    An excellent learning tool for students and practitioners, this guide to noise control will enable readers to use their knowledge to solve a wide range of industrial noise control problems. Working from basic scientific principles, the author shows how an understanding of sound can be applied to real-world settings, working through several examples in detail and covering good practice in noise control for both new and existing facilities.

    • Brand: Colin Hansen
    • ASIN: 0415358612

  • Headphones, In-Ear Heavy Bass Earbuds with Volume Control, Noise Cancelling Metal Earphones with Mic for iphone and Android Phone(Silver)

    Hifi Stereo Sound and Heavy Bass. Tuned by a Bose Sound Engineer. Unique Appearance and Comfortable Ergonomic Design. Easy Operation. High-Quality Earbuds and Services. How to Control: Volume +: Press the top button once. Volume -: Press the bottom button once. Next Song: Double Click the middle button. Previous Song: Triple Click the middle button. Play/Pause the music (Take/End a call): Press the middle button once. Reject a Call: Press and hold the middle button about 2secs. Trust us, you will not regret if you have purchased this earbuds. Don't hesitate, Add to Cart!

    • Color: Gray
    • Brand: ZFRE-HJ
    • ASIN: B0764FHJX8
    • UPC: 704129704602

  • Ultrasonic Pest Repellent, Pest Control Ultrasonic Repeller Set of 2, Indoor Plug in Repellent for Mosquitoes, Mice, Rat, Bug, Roach, Spider, Rodent and More Insects, Safe for Human and Pets

    From now on, say "HI" to safe and mosquito-free environment, say "GOODBYE" to insect bites and stings, no pests infestation anymore. Baby will sleep soundly and peacefully. Upgraded Ultrasonic Chip Drives pests away by affecting their auditory and nervous system to make them uncomfortable, which will keep them away from your home after a few short weeks of use. Inaudible to human and pet's ear. Nontoxic & Eco-friendly Odorless and chemical-free, no more mouse traps and insect spray, compared with the traditional pesticide, this electronic pest control is much safer for human and pets (except for pet hamster). Easy To Operate Plug and play, and then just wait, it works when the indicator is on, just like a home décor on the wall. With 3W low power consumption, saves more energy and electric bill. The most effective and cost-efficient solution. Effective Coverage Area Effective in an area up to 800~1200 sq.ft. Cause the ultrasonic waves cannot penetrate the walls, so we suggest installing one pest repellent for per normal size room, more units for areas with serious pest problems. ★★Note: 1. For indoor use ONLY! 2. Please DO NOT use the repeller if you have rodent or insect pets like hamsters, lizards and spiders. 3. It is normal that pests will increase at the beginning of us...

    • Color: white
    • Brand: WeHome
    • ASIN: B07F2KTFY7

  • JIES Earphones In Ear Headphones Wired Earbuds Bass Headsets Noise cancelling Sweatproof With Microphone Multifunction Control & Volume Button For Apple iPhone iPod Samsung Android Mp3 (Gold)

    Isolate noise These sound isolating earbuds can block out 90% ambient noise. You can easily enjoy your music anytime anywhere with these noise isolating earbuds, even at noisy streets. They help stop disturbance from the outside when you are doing yoga, reading, thinking and relaxing. Just stay in your private world. Stay secure in ears while working out In ear design ensure JIES metal headphones will not become loose and fall out of ears. Great sports headphones for running, fitness walking, jogging, gym, Exercise, dancing and hiking. They are also sweatproof headphones. Let you enjoy exercise and will not have to worry about your exercise earbuds coming off even during intense workouts. Decent sound and bass High quality audio signal transmission ensure outstanding Hifi performance. The sound comes out is loud and clear. Strong bass stereo makes the beats more energetic and activate you in sport. Start to enjoy live concert-like music with these stereo in ear headphones! headphones for iPod, iPhone, Mp3 Player, iPad, and android Smartphones tablet. One year quality warranty If there are any quality issues, we'll give you a total refund or a replacement, at no cost without questions asked. We just want your 100% satisfaction

    • Color: Gold
    • Brand: Jies
    • ASIN: B07CK1751Y
    • UPC: 742500281205

  • Openuye No Bark Collar USB Rechargeable Dog Training Collar 7 Sensitivity Harmness Bark Control Shock Collar for Small Medium Large Dog

    Live peacefully with the Openuye No Bark Training Shock Dog Collar. Since barking dogs can be disruptive and intimidating, this collar was designed as a humane way to put your good boy on his very best behavior. Using progressively increasing sound and shock after each bark, it helps pets to quickly understand when it's time to be quiet. The microprocessor is able to distinguish his bark from other environmental noises, and can easily be adjusted to control the sensitivity of its response. The technique of progressively increasing sound and shock is more humane, and it's also proven to be more effective in breaking the barking habit. Specification: Sensitivity: 1-7 gears adjustable , 1 gear for the least sensitive, 7 gear for the most sensitive. Vibration: 0-7 gears adjustable. 0 gear: the product does not vibrate Shock:0-7 gears adjustable.0 gear:the product does not act. Please adjust 0 gear if you do not need to shock your dog The products are lightweight. It fits all dogs from 15-150 LBS. Weight:0.15lbs Rainproof and Rechargeable The Length range of the dog collar:3.71~21.46 in Note: 1. Never connect a lead to the electronic collar; it is going to cause excessive pressure on the contacts. 2. Avoid leaving the collar on the dog for more than 12 hours per day. A collar wo...

    • Color: Black
    • Brand: Openuye
    • ASIN: B077X7NNFF

  • UT353 Sound Level Meter Noise Detector Digital Noise Meter Sensor for School Classroom Kids

    Noise Measurement: 30~130dB, Resolution: 0.1dB, Accuracy:±1.5DB, Frequency Response: 31.5Hz-8KHz Sample Rate: 100/125ms Max/Min Measurement: Display 'MAX/MIN' Data Hold: Display 'HOLD' Backlight: Manual On/Off Auto Power-Off: 5min Low Battery Display: 3-3.5V Battery: 3 X 1.5V AAA Batteries (NOT included) Work Current: ≤40MA, Standby Current: ≤10uA Work Temperature: 0-40°C Work Humidity: ≤80%RH

    • Brand: Aneil
    • ASIN: B077N655Y6
    • UPC: 711453277771

  • Primary Concepts, PC-7500 Hourglass AC Adaptor Classroom Timer Supply

    2-In-1 classroom timer and noise controller! times tests, games, any classroom event too loud? hourglass lets them know! visible and audible for the entire classroom hourglass is a dual-function classroom management system that can be used as a timer and as a noise detector. The giant display of lights is a dynamic measuring tool that can be seen by everyone in a classroom or even an auditorium. One year unconditional warranty. Requires 4 "C" batteries (not included) or optional AC adaptor. Battery life in a typical classroom operation is 6 months- 2 years, but varies according to usage. 15" x 8" x 4.5". timer mode adds structure and focus to tests, games and other timed events. Everyone can see the lights fall from the upper part of the "sand timer" to the lower part. As "time's up" approaches the lights turn red, and a one-minute warning tone sounds. When the time is up, sound plays and lights flash to clearly signal the end. Noise mode helps control classroom noise. Everyone can see the rows of "sound meter" lights rise and fall, indicating the noise level in the room. At the "trigger point" set by the teacher, a warning sound plays and lights flash, signaling the room to quiet down!.

    • Brand: Primary Concepts,
    • ASIN: B01BN1L7CE
    • UPC: 858987005590

  • Kinbashi Noise Cancelling Earbuds with Microphone Volume Control Stereo In-Ear Wired Earphones Universal Noise Isolating Earbuds Headphones for iPhone Samsung Motorola Smartphone PC 3.5mm Port (Black)

    Noise cancelling and Ergonomic comfort design Ergonomic In-ear silicone design with multiple sizes eartips (S,M,L) perfect fit with your ears which isolate outside noise with highly qualified sound insulation effect and never fall off your ears. Hand-free: Your music keep moving and blasting you don't have to break stride. The built-in microphone and remote allows you to easily change tracks, play / pause, or you have an incoming call, you can easily switch by a click the remote to answer the call. Universal Compatibility Universal interface diameter-3.5mm audio jack which ideal for Apple devices iPhone 6, 6 Plus, 6s, 6s plus, iPhone SE 5, 5s, 5c, iPhone 4, 4s iPad mini 2, 3, 4, iPad 2, 3, 4, iPad Air; iPod Touch 5, 4 Nano 7 Android smartphones; most Samsung Galaxy and Note series, Nexus, HTC, Sony; Mp3/ Mp4 Player; Kindle Laptops, PC, tablets and other devices with 3.5 mm stereo audio jack. Volume Control 1.call control: Answer call: Press one Reject call: Long press 2.Music control Play/pause music: Press once Next song: Press twice Previous song: Press three times 3.Volume + & Volume - Package Included: 1 x In-Ear Earphones with medium size eartips 2 x Multiple Sizes (S,L) Eartips 1 X Earphones Carrying Case

    • Color: Black
    • Brand: Kinbashi
    • ASIN: B076CMGZ4R