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Tuesday, September 29, 2020
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    Gold price up by Rs300 to Rs117,700 per tola

    Gold price up by Rs300 to Rs117,700 per tola

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    Rupee gains 53 paisa against USD in interbank

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    LPG price goes up by Rs5/kg

    Moody’s upgradation of Pakistan outlook affirms sound financial policies: Finance Ministry

    Moody’s upgradation of Pakistan outlook affirms sound financial policies: Finance Ministry

    Gold up by Rs400 to Rs123,900 per tola

    Gold soars to all-time high of Rs132,000 per tola

    The Asian Development Bank’s COVID-19 response reaches $9.3 billion to end July 2020

    The Asian Development Bank’s COVID-19 response reaches $9.3 billion to end July 2020

    Financial close of Thar Block-2 Power Plant in Sept end, says Asim Saleem Bajwa

    Financial close of Thar Block-2 Power Plant in Sept end, says Asim Saleem Bajwa

    Gold up by Rs400 to Rs123,900 per tola

    Gold up by Rs400 to Rs123,900 per tola

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    Suga set to become Japan’s premier

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    Johnson says plan to break Brexit treaty needed to counter EU’s ‘revolver’

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    Kabul presses ceasefire demand in Taliban talks

    China coronavirus vaccine may be ready for public in November: official

    China coronavirus vaccine may be ready for public in November: official

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    Trump to preside over historic Arab-Israel recognition deals

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    Over 70 held in Melbourne after protest against lockdown

    Libyan protesters torch parallel govt’s offices

    Libyan protesters torch parallel govt’s offices

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    Women grieve stillborn babies as Covid-19 hits maternity care in rural India

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    October, November to be ‘tougher’ in Europe with more covid deaths: WHO

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      Pakistan invites Japan to explore investment opportunities under CPEC

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      Snap pledges to hire more minorities, women in tech roles

      Snap pledges to hire more minorities, women in tech roles

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      PTA lifts ban on PUBG after meeting company representatives

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      Qualcomm quick charge 5 announced supporting 100W fast charging

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      Huawei launches Maimang 9 with 64MP triple cameras for $300

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      Black holes are hiding movies of the universe in their glowing rings

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        Agha Ali sends prayers towards Sarah Khan, Falak Shabir

        Agha Ali sends prayers towards Sarah Khan, Falak Shabir

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        Rihanna makes foray into skin care with Fenty Skin

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        Actress Kelly Preston dies of breast cancer at 57

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        Mahira Khan shakes leg with Lebanese actress Daniella Rahme in Paris

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          Gold price up by Rs300 to Rs117,700 per tola

          Gold price up by Rs300 to Rs117,700 per tola

          Rupee gains 53 paisa against USD in interbank

          Rupee gains 53 paisa against USD in interbank

          LPG price goes up by Rs5/kg

          LPG price goes up by Rs5/kg

          Moody’s upgradation of Pakistan outlook affirms sound financial policies: Finance Ministry

          Moody’s upgradation of Pakistan outlook affirms sound financial policies: Finance Ministry

          Gold up by Rs400 to Rs123,900 per tola

          Gold soars to all-time high of Rs132,000 per tola

          The Asian Development Bank’s COVID-19 response reaches $9.3 billion to end July 2020

          The Asian Development Bank’s COVID-19 response reaches $9.3 billion to end July 2020

          Financial close of Thar Block-2 Power Plant in Sept end, says Asim Saleem Bajwa

          Financial close of Thar Block-2 Power Plant in Sept end, says Asim Saleem Bajwa

          Gold up by Rs400 to Rs123,900 per tola

          Gold up by Rs400 to Rs123,900 per tola

        • World
          Suga set to become Japan’s premier

          Suga set to become Japan’s premier

          Johnson says plan to break Brexit treaty needed to counter EU’s ‘revolver’

          Johnson says plan to break Brexit treaty needed to counter EU’s ‘revolver’

          Kabul presses ceasefire demand in Taliban talks

          Kabul presses ceasefire demand in Taliban talks

          China coronavirus vaccine may be ready for public in November: official

          China coronavirus vaccine may be ready for public in November: official

          Trump to preside over historic Arab-Israel recognition deals

          Trump to preside over historic Arab-Israel recognition deals

          Over 70 held in Melbourne after protest against lockdown

          Over 70 held in Melbourne after protest against lockdown

          Libyan protesters torch parallel govt’s offices

          Libyan protesters torch parallel govt’s offices

          Women grieve stillborn babies as Covid-19 hits maternity care in rural India

          Women grieve stillborn babies as Covid-19 hits maternity care in rural India

          October, November to be ‘tougher’ in Europe with more covid deaths: WHO

          October, November to be ‘tougher’ in Europe with more covid deaths: WHO

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            China-Pakistan sign development agreement of Rashakai SEZ under CPEC

            China-Pakistan sign development agreement of Rashakai SEZ under CPEC

            China – Pakistan to sign Rashakai SEZ development agreement under CPEC today

            China – Pakistan to sign Rashakai SEZ development agreement under CPEC today

            Pakistan, China to ink deal on development of CPEC’s Rashakai Economic Zone tomorrow

            Pakistan, China to ink deal on development of CPEC’s Rashakai Economic Zone tomorrow

            Pakistan invites Japan to explore investment opportunities under CPEC

            Pakistan invites Japan to explore investment opportunities under CPEC

          • Technology
            Snap pledges to hire more minorities, women in tech roles

            Snap pledges to hire more minorities, women in tech roles

            PTA lifts ban on PUBG after meeting company representatives

            PTA lifts ban on PUBG after meeting company representatives

            Qualcomm quick charge 5 announced supporting 100W fast charging

            Qualcomm quick charge 5 announced supporting 100W fast charging

            Huawei launches Maimang 9 with 64MP triple cameras for $300

            Huawei launches Maimang 9 with 64MP triple cameras for $300

            Black holes are hiding movies of the universe in their glowing rings

            Black holes are hiding movies of the universe in their glowing rings

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            • Lifestyle
              Agha Ali sends prayers towards Sarah Khan, Falak Shabir

              Agha Ali sends prayers towards Sarah Khan, Falak Shabir

              Rihanna makes foray into skin care with Fenty Skin

              Rihanna makes foray into skin care with Fenty Skin

              Actress Kelly Preston dies of breast cancer at 57

              Actress Kelly Preston dies of breast cancer at 57

              Mahira Khan shakes leg with Lebanese actress Daniella Rahme in Paris

              Mahira Khan shakes leg with Lebanese actress Daniella Rahme in Paris

              Abida Parveen is Jada Smith’s ‘spiritual mother’

              Abida Parveen is Jada Smith’s ‘spiritual mother’

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              Katrina Kaif’s picture with sister Isabelle Kaif makes for a perfect sibling selfie

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              Home Technology

              Noise-cancelling windows halve traffic sounds even when they’re open

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              12/07/2020
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              Noise-cancelling windows halve traffic sounds even when they’re open
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              People living in cities with warm climates face a problem during summer months: keeping windows open for ventilation means letting in traffic sounds. A noise-cancelling device could solve this dilemma.

              Bhan Lam at the Nanyang Technological University in Singapore and his colleagues have created a device that can halve the noisiness of urban traffic, reducing the sound coming through an open window by up to 10 decibels.

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              To cancel out road noise, the researchers used 24 small loudspeakers and fixed these to the security grilles of a typical window in Singapore in an 8×3 grid. These grilles are a common feature across South-East Asia, says Lam. He adds that the spacing of the speakers was dependent on the frequency of the noise that they wanted to cancel out.

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              The team placed the window in a replica room and played road traffic, train and aircraft noise from another loudspeaker 2 metres away. The frequency of most of the noise from traffic and passing aircraft ranges from 200 to 1000 hertz. Large trucks and motorcycles tend to generate sounds on the lower end of the range, while the majority of the sound from motorways is around 1000 Hz.

              The researchers spaced each speaker 12.5 centimetres apart facing outwards and programmed them to emit sounds at the same frequency of noise detected by a sensor placed outside the window.

              The device was most successful at cancelling noise between frequencies of 300 and 1000 Hz, with up to a 50 per cent reduction in loudness for sounds within this range. It isn’t optimised for the noise from human voices, which have higher frequencies.

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              The effect is similar to the technology used in noise-cancelling headphones, which are often tuned specifically to cancel out the hum of aircraft engines, says Lam.

              The speakers the team used were only 4.5 centimetres in diameter – too small to cancel out noise at frequencies below 300 Hz. “A speaker needs to move a huge volume of air for low frequency sounds,” says Lam.

              Having larger speakers is a possibility, but risks blocking out too much of the view from a window. The team plans to test a prototype in real-world experiments.

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